I picked Number 3. Defend and rebound like a madman, and I'd like to see more putbacks from him. More dunk opportunities would help immensely, but that involves the rest of team getting him some good passes near the basket. Let D-Mo and Harden be the ones that manufacture their own points, and let Dwight be a ferocious defender and garbageman that cleans up everything down low. He'll get plenty of points that way, but he won't get that many if he TRIES to get that many.
OP forget one thing in the poll: Free throw. I believe Howard will step up in the playoffs. If he can also get to >60% free throw mark again like last off season, this rockets team have much better chance to go all the way.