Warriors are martial masters, which allows for a wide range of interpretation. If your character is a soldier, gender comes into play. As the Sentinels were female only up until approximately 10 years before the current timeline, male warrior Sentinels will only have a decade's worth of formal military training, maximum. Females, however, could have Sentinel training as far back as 10,000 years back. Sentinel Warriors can be either your standard foot soldier or they can be part of the mounted, shield wielding cavalry, Huntresses (note: Huntresses are not the hunter class, per say, they are unique to Night Elf military).
If one is not a standard soldier there are more options. You could be a wandering blade master, moving from spot to spot. You could be a part of a town militia. Perhaps a blacksmith who trains with the weapons he/she makes? Or you could be part of the military arm of the Cenarion Circle, which we see in Silithus.
Like with Warriors, Rogues follow the same, vague prerequisites. They can be spies, assassins or simply thugs or self-learned fighters. Also like the above, Rogues can be part of the Sentinels, meaning the gender restriction still applies. Rogues in the Sentinel army can act as runners, spies, scouts, assassins and other stealth-oriented ranks.
Outside the military, Rogues fall into a few ranges. Crime seems to be fairly low in Night Elf society, which means playing a thug or thief seems less viable. However, you could easily play freelance spies, bounty hunters, self -learned fighter, a sailor or swashbuckler or an information gatherer.
Hunters are those who employ beasts and archery in their adventures. Again, like the above, this has a fairly wide range of paths one can follow. Hunters can fall into a number of specializations, from marksmen to beast tamers to simple trackers. However, in Night Elf culture, hunting is steeped in tradition.
Archers are frequently employed by the Sentinels, which once again means there are the above gender restrictions. Here, they are generally archers and trackers, alongside an animal companion. Those who aren't in the Sentinels can simply be your usual hunter, beastmaster, archer or woodsman.
Even though Hunters can tame most any beast there are some that lend themselves to a Night Elf flavor:
-Owls: Owls were the favored companions of Priestesses of the Moon and Huntresses. -Chimaeras: These beasts were once used by the elves as aerial fighters.  -Nightsabers: The have tamed them and are even able to communicate between one another.  -Bears: Often tied to the druids of the claw, also with the Ancients Ursoc and Ursol -Wolves: Tied to the Ancient Goldrinn. -Frostsabers: These legendary cats allied themselves with the night elves 4,000 years ago when Priestess Tyrande Whisperwind saved the frostsaber queen, Shy-Rotam, from rampaging giants. These intelligent creatures are cousins of the nightsabers, but have larger appetites that earned them the nickname "dragon belly". Additionally, they are raised from infancy, forging lifelong bonds of trust between rider and beast. Taming frostsabers from the wild requires patience and strength, which has made them popular among huntresses and priestesses. 
Druids are set into the reverse gender roles as the Sentinels, with the Cenarion Circle only taking females starting 10 years ago. This means that the males are, for the most part, going to be more experienced. Most druids have to choose a path or 'totem'.
Druids of the Talon use aerial forms, such as storm crows, and command spells such as faerie fire and cyclone. This tends to put them more in the 'Balance' tree. The biggest issue for this was the Moonkin form. With the expansion of Pandaria, however, one can glyph out of this. Their primary role in society is information gathering and intelligence. They have the ability to transform into storm crows and fly over the field of battle to scout and deliver orders to distant troops. Druids of the Talon are also known to take forms of the cat, as seen in player garrisons in the Draenor expansion. Their leader is Skylord Omnuron.
Druids of the Claw transform into beasts, such as bears and cats. They usually prefer melee and stay on the ground. This generally puts them in the Guardian and Feral trees. The leader of the Druids of the Claw is Lea Stonepaw, a female druid.
Druids of the Antler is a druidic subgroup who take the form of a stag and revere Malorne, father of Cenarius. They were first mentioned in the Warcraft Encyclopedia, and come Legion they can be found within Malorne's Refuge in Val'sharah. The Druids of the Antler have rarely let themselves be known to outsiders; like Malorne, they spend most of their time in the wilds. Their leader is Sylendra Gladesong. 
Druids of the Wild are druids who are prompted to train slightly from each totem, giving them some aptitude with each form. This is more of a class than a confirmed organization.
Druids of the Flame and Druids of the Fang are considered enemies of Darnassus.
All druids have the capacity to heal and commune with nature, such as calling roots from the ground or healing rain from the sky. Some just are better or more focused on this aspect of druidism.
Archdruids are incredibly powerful members of the Cenarion Circle and generally lead their own groups of druids. To roleplay an Archdruid would imply that their skill and mastery of druidism is far beyond others. This may be frowned upon by others.
Druids and Night Elves in general only have antlers growing from their brows as a sign of great, arch-druid level power and aptitude.
Priestesses are much like the Sentinels in that they only started allowing males to join about 10 years prior to the current timeline. Because of this, a male priest may still only be an acolyte while females can be very experienced.
There are no known Shadow Priests of Elune. The Night Elf creation myth specifically states that Elune's power is present during times when the moon is not seen, meaning her light shines no matter what. Night Elf Priests specifically call to Elune for their holy power but there seems to be no source for the Shadow Priest's magic.
Tyrande is the High Priestess of Elune. One should refrain from using the title 'High Priestess'.
Mages are split into two subsections, Highborne refugees, and Night Elf apprentices. When the Highborne returned they were permitted to teach the arcane arts to others. Because of this, the Highborne can have up to 10,000 years’ worth of magical experience, yet the Night Elf learners will have less than a year.
As a Night Elf mage, you may be fairly young, as it is noted that those who joined the Highborne were only of age. Overall they will be much more liberal than the other Night Elves, having picked up a previously forbidden practice.
The Highborne, on the other hand, are very different from Night Elves. Prior to their return, they were holed up in Dire Maul, draining magic from the demon Immol'thar. The Highborne are not exclusively arcane practitioners, as they can be warriors or rangers as well. Most Highborne respect only power, and are generally known for their haughty, arrogant attitudes.
Because of their isolation for some several thousand years, the Highborne use outdated arcana. Other, more progressed races, such as the Blood Elves (who were free to practice, advance and study magic without being in a hole) moved past or improved upon the Highborne magics still used today.
The Highborne are known to wear extremely outlandish outfits, gaudy and clashing in color.
Arcane magic is forbidden on Teldrassil. Night Elves who are learning the arcane arts are likely to train at the Tower of Estulan in Feralas. They may practice outside Teldrassil however, as the practice of arcane is no longer illegal. 
Monks are a martial-arts based class of fighters whose primary attacks are done with their fists. Despite the fact that they're pretty much defined by that unique fighting style, there's actually a lot more to monks than just fighting. All monks trained in Azeroth are being advised and taught by the Pandaren from the Wandering Isle who have chosen to share their skills with the rest of the world.
However, because non-Pandaren monks have adopted Pandaren philosophy and even venerated their deities, it conflicts with traditional night elf roots. To help bring more depth to traditional kaldorei monks, the Silver Circle supports a headcanon monk style unique to the kaldorei.
Demon hunters are the disciples of Illidan Stormrage who embrace fel and chaotic magic-energies that have long threatened the world of Azeroth – believing them necessary to challenge the Burning Legion. Wielding the power of the demons they’ve slain, they develop demonic features that incite revulsion and dread in fellow elves. 
Demon hunters ritually blind themselves in exchange for spectral sight that enables them to better sense their prey. This enhances awareness, together with their great agility and magical powers, makes demon hunters unpredictable adversaries.