I would prob choose a warlock, but I hate the idea you can't rename the demons! So nothing there...mage is ok but a bit boring honestly...I dunno, any suggestions?

NO DKS!!!!

A paladin can take a crazy beating, and is pure awesome for PvE. Haven't done PvP with it yet though.
Priest is kinda cool too, although you dont have too many attack skills.
Haven't tried druid yet. (I find the name kinda silly)
I myself am a fire mage, and get DPS through the roof Fun for dungeons and stuff, but hard in PvP, as you dont have a single protection spell.

Ok, Warlocks are great and easy to level... i'd say paladins are the best (you could be a healer) it's a great class... really versatile.

Oh, and check out this in-game levelling guide for wow... it'll help you level 500% faster man, i've been using it for 3weeks and i've managed to get 1 lvl85 and im half way through levelling my second 85. It's only $25 (£15) it's well worth it man.