WoW Pally Or Warrior?

I cant decide between a Paladin or a warrior in WoW, I know pallys heal and r good at DPs and also Tanking but warriors are good at Tanking and DPS, and i dont really care about healing, apart from when im grinding. I will be using it for mainly raids and not so much PvP, but I want to be flexible so i can swich to PvP and be good @ it.