Dude has a genetic limitation but never lets it slow him down.  In fact, it gives him a look that helps a lot in movie roles.
Probably one of my favorite actors.  Always playing that unraveling character that really gives a shit.  inspirational for BBers everywhere.
Ptosis 
Whitaker's left eye ptosis has been called "intriguing" by some critics[42] and "gives him a contemplative look."[43] Whitaker has explained that the condition is hereditary and that he has considered having surgery to correct it, not for cosmetic reasons but because it affects his vision.[44]