Some games are better at some genres than others, D&D included. I agree with Mark, that D&D is more of a tactical and strategy based system, where the goal is to be the smarter combatant and find the right advantage to end the fight quickly. For the style that is described above, check out Exalted. Describing your character glaring menacingly for several seconds, sweat rolling from his brow, then leaping into the air and bringing your sword crashing down, crackling with energy into your foe, actually gets you bonuses to hit. 