I'm not quite sure what I'll do if I come back for Cataclysm. I have 4x shaman, 4x paladin, DK, and priest on my accounts. I think shaman will probably work pretty well again, so that's an option if there's enough changes to make it interesting again (I burned out on that team about 9 months ago). If melee works again, I'd love to see what the paladins can do, maybe sub in a warrior or enh shaman which I have waiting at 80.

Really want to try another all caster team though. Have always wanted to try druids or mages... or revisit locks/priest which is what I played at 70. I don't really do gimmick teams anymore though... I need to at least be able to do heroics with a tank and tear up BGs - arenas I'm not as concerned about anymore. They're kind of played out, I always enjoyed BGs more and the dynamics of arena really limited you to about 2 or 3 viable comps max... some really fun comps in BGs (lock teams, boomkins, etc.) were just worthless in arena.