He's had a lot of good ones but my favorite is Enemy of the State. I'm a big fan of that genre of movie and Enemy of the State was a pretty good movie for that genre. Gene Hackman and Jon Voight and Will Smith were all good in it.
I have to say that i think the move " Dr Hitch" is one of the movies in which he did well in. MIB is where he first started and i can still remember him in his role on the "Fresh prince of bellair".