Originally Posted by
Gigana
Don't play a ret paladin. They're in a really bad spot right now.
Of the classes you have at 90, literally every one is good in PvP right now, with ele shamans and resto/moonkin druids having access to the current best comps in the game (LSD and LSD2). Ele shamans are also super easy to play currently, so you might want to consider that. If you want melee, look no further than warrior.
As for good comps, there's tons there: rogue/mage/healer, warrior/mage/healer, warrior/ele/healer, shaman/lock/x, lock/mage/healer, rogue/hunter/healer, warrior/hunter/healer, etc.