Well I guess as good a place to start as any is from the very beginning.
I've always prefered magic-users and spellcasters in RPGs. In D&D I've always been a sorcerer or a wizard (for the record, scorcerers are more fun). I've been facinated with magic since I was a child, and I still consider "hit with stick" classes mundane and boring.
My main (and really my only character) is Luthvian, a level 80 Draenei Mage on Bonechewer (though originally of Stormreaver). But she was not my first character.
My account was originally my boyfriend's account, and was created in January 2007. Luthvian was created in October 2007. Whatever did I do for... *counts* 9 months and change? Experimented with a series of terrible characters.
I started on Chromaggus as an Undead (didn't have BC yet so was stuck with ugly Horde) warlock. I stubbornly played that character until she got to level 17 (took forever, I hated it that much). Deciding that maybe she wasn't my type, I went and made a bunch of low-level alts both on Chromaggus and as Alliance on Antonidas. My very first mage was Karla, a Gnome on Antonidas. She is level 11, and has been for almost 2 years now. The only character I ever stuck with for a measurable amount of time was Piratecake, my Tauren Shaman.
In October 2007, I moved into a house with some new roommates, both of which played Alliance on Stormreaver. One was a warrior, the other a... mage! So I picked up BC and started myself a Draenei mage, figuring I'd play for a bit and then toss in the towel again.
And yet, here I am, a year and a half later still playing little Luthvian. A lot has changed since we started. I can't explain why I had a particular affinity for Luthvian. Maybe because Draenei are really hot? For sure, at lot was because I had people to play with (well, run me through stuff, they were both level 70 before I hit level 20).
However, I think the primary driving force was that early on, I got into an awesome guild.
And as much as I'd love to wax eloquent about my guild, this post is long enough. That'll come later.