He's just funny. Well, he's funny most of the time. He certainly isn't at his comedic best in the new movie Down To Earth. The movie, which he stars in and co-wrote, plays more like the movie version of Chris Rock's comedy that everyone's already seen. As a fan of Rock over the years, I've seen the HBO comedy specials and heard the bits.
Comedians typically have a set of gags they can do.
To me, the true test of successful comedians is when they are funny in every TV special you see them in and doesn't repeat the same joke you've heard countless times. If comedians keeps it fresh and funny, they look like a funny guy. If comedians repeat the same jokes, they look like they're reading a script. The end result is just not good. Enter Down To Earth, a movie whose plot is already on shaky ground from the start.