I'd have to say dervish.
Balance of magic and warfare? Yes plz.
I like being a jack of all trades, but not totally into the concept of rangers and nature. A little too colourful for me, and there's a lot of them running around (I think they're the most popular mains)
It's too bad they didn't come out sooner though. Warriors were a little too smash-hit-smash-hit etc. for me, and assassins were a little too fragile (back before critical agility and defenses, at least :P)
Warriors too buff. Assassins too skinny. (no offense :P)
Dervish is like the middle ground, which is my favourite.
My previous favourite was paragon, which WAS going to be my main class, but I found their gameplay to be a little too passive for me.
So, dervish ftw. Also love the fact that they worship all gods. Solid background/lore, nice armor design and AL. 4 pips regen, and extra health.
Oh baby.
My ideal profession would be Dervish/Paragon however. Too bad it's not effective.

Imagine a holy hooded warrior flinging spears and commanding an army, while slicing/dicing people like lambs.
K yeah I think I'm done now.
It's a pity that they don't farm too well (well, relatively) otherwise I could've creamed my panties all the way to France.
gogogo chocolate mango
sweet, juicy, and brown.