I'm having fun right now with a Druid mana ramp deck.
Idea is to hit 6-7 mana while your opponent is on 3-4 mana. Then start droppin fatties.
Ragnaros, Barron Geddon, The Black Knight, Sylvannas, Cenarius and Onyxia currently are my game finishers.
Big Game Hunter, Innervates, Nourishes and...