I think Peter's dad was the least funniest, I think Louis's dad has a few good moments, like this one:

http://www.youtube.com/watch?v=jbxOXSujwu0

and this one:

http://www.youtube.com/watch?v=m2RZm...eature=related

Joe has a few moments too but he's not that funny, but when other characters pick on him, it's kinda funny. Meg sucks though lol, it's just funny when other people talk crap about her, she doesn't really do anything funny, she just sets people up