Hi, I'm returning to the game having not played since Cata and thinking of rolling a healer. I've usually stuck to Dps/tank rolls but fancied something new. I'm not asking for a "which healer is best" type answer, more a breakdown of the styles. For example I know Druids are hot based, pallys are strong single target healers. But that's about the base of my knowledge.
I'd only be looking at pvp, heroics and LFR. So top end game performance doesn't really matter to me.