<--- quit WoW a few weeks ago after being an officer in one of the top raiding guilds on my realm for approx 8 or 9 months.
I played a 60 druid, 60 warrior, and 60 lock.
Due to my feral gear, my druid was pretty wicked ... (13K armor and 6.5K hitpoints in Bear form with tank gear, about 1100 AP with DPS gear in cat form, 7K mana pool and 600 +healing with healing set on. My "hybrid set" got me about 1K ap in cat, 11K armor + 6K hitpoints in bear, 300+healing and 5.5K mana self buffed.)
I think I may have pissed off the guild MT once also, because with chimera food and raid buffs in my tank gear ... I got up over 8400 hitpoints, which was more than his full tier 2 set with the same buffs.
I got really bored of the warrior. I imagine with better gear, he would have been better at DPSing or tanking ... but with his ZG blues/purples and pure prot spec .... my Druid was FAR better at both.
My lock was a mean mofo. I played with all the different trees, and all of the popular builds before quitting. I never really geared him up too much (ROTV, a couple of pieces from MC, then some select blues/greens.) I loved that toon.
perhaps I'll play when Burning Crusades comes out ... but I don't think I'll ever be big into raiding again.
EDIT: also, I had a 57 pally (was my first toon, really horrible class to play IMO.) I had a 46 mage, 35 hunter, a 42 mage on another realm, and a BUNCH of level 1-30 toons across several realms.)
I got bored with the Mage and Rogue pretty quickly, The Hunter was a fun class, very easygoing and sorta mindless entertainment, and at a good pace, but it was the very last class I tried. I would have definatly leveled the hunter to 60 if I had continued to play.