Let's face it. All actors have some sort of "type". This is the reason they're cast for most of the roles they play.
A lot of A-listers are like that. Robert DeNiro, Nick Cage, Brad Pitt, George Clooney... the list goes on. I mean, hell, take anyone from any romantic comedy you've ever seen and look at their imdb list. For most of them, their entire career is spent playing those types of roles.
Good actors break away from the pack. Comedy actors, however, don't move far away from what works for them. As any thespian will tell you, comedy is harder than real life. From a comedian's standpoint, it's their bread and butter.
What it boils down to is whether you like the role they consistently play.
I like Will Ferrell because he writes funny parts for himself. Roxbury, Anchorman, Talladega Nights, Step Brothers were all written by Will.