To me, Stepbrothers was the worst. It's people doing things that are so inconsistently mean and retarded that it takes you out of the movie constantly.
Ricky Bobby is the greatest though; you're missing out on tiny baby Jesus.
5 stars for Will Ferrell because I don't always think he's funny but this I will give him credit for always being a good sport. Being self deprecating is not as easy as it looks.