He's moderately funny - but is best as the straight foil to a more outlandish actor. Some of his films have sucked (Along came Polly, Starsky and Hutch), while others have flirted with greatness (Royal Tenenbaums, Your Friends and Neighbors) Most of his films are funny and entertaining, but sink or swim depends more on the writer and director than him. He can't save bad material like Jim Carrey, Adam Sandler, and other comedians can, but give him a good role and the lines to go with it, and he'll deliver the goods. His string of box office hits will guarentee him a spot in the $20 million club if he keeps up his hot streak. So, the answer to your question is, no, he's not a genius, but he knows how to pick a winner, and in today's hollywood, that's what matters most.