Why doesn't Leo turn into a chameleon?

He's indubitably one of the finest actors in recorded history. And he has bedded so many supermodels that he must be knowing Victoria's secret. His playboy image notwithstanding, he brings to his craft a touch of unforeseen dedication. But Leonardo DiCaprio is rarely seen in heavy makeup. Or crazy costumes. Or for that matter, a makeover. He finally managed to break his onscreen good-guy image with a racist act in Django Unchained last year. Oh yes, he put on an accent in Blood Diamond and bulked up for J. Edgar although the awards didn't roll in. Speaking of which, his second film What's Eating Gilbert Grape earned him an Oscar nod. For the record, he played a mentally challenged boy in it with such panache that the drool-worthy Jack Dawson had to redeem him four years later. Of course his career literally launched into new heights post-Titanic with dismissible bumps in the middle. The new millennium saw him collaborate with bigwigs like Scorsese, Spielberg, Ridley Scott, Clint Eastwood, Nolan, Luhrmann and Tarantino. He's doing great but wouldn't it be greater to don on a mask for a change or build six-packs or something? Johnny Depp has been so much into character that you may not even remember the last time you saw his face in a film. Similarly, it's impossible to separate Wolverine from Hugh Jackman. Brad Pitt went a step ahead and wore a skirt in Troy. When was the last time Leo did something crazy or wasn't similar to how he looked like in his previous film? He'll be turning 40 in a couple of months and has already starred in 24 full-length movies. The Wolf of Wall Street will be 25th. Does he look different in the trailer?