I'm happy with holy. Insane burst healing, Insane MT healing, Hand spells, Instant spells.. And now with soon full epic gear my Holy light glyph triggers a 1.4-2k aoe heal, add beacon of light and insta-heal spells and we can heal aoe encounters.
Paladin is challenging, but if you play it well for sure the best healer for heroics/10man raids (Combined with a good aoe healer).
What's your game?