Personally I think I like bug the least, because it feels like the bug typing doesn't give them anything beneficial, and instead gives them some pretty common weaknesses. I think a lot of dual-type bug pokemon work just as well as single type pokemon, particularly most poison/bug pokes like the venipede line... I also don't like that they're usually only good until early/mid game, and then you have to find replacements.
Still though, I probably wouldn't want bug pokemon removed or anything like that, 'cause I'm used to them and they balance the game out.