his height is his only drawback
great actor, love most of his films, but when it comes to doing action films like Ghajini and the potential Dhoom project, i personally think he's sort of miscast in those roles, due to his height taking away that persona of a hero...since he's a bit too short and it gets kinda weird seeing him stand next to taller actors.
Then again Jet Li is short too and he's a great action star, so I guess it's not all that weird in Aamir's case either :P
An ancient race... as Charles Bronson put it.