I ALWAYS vote to skip Wetwork, I absolutely despise the map, especially on Search and Destroy. I Tend not to vote Bloc though. I think some people probably don't like it because sniper rifles are so dominant on it, in core game modes at least.
On Creek I just sit up on top of the house and snipe. But if you are on the other side you are absolutely screwed, I don't think I have ever seen a team win a TDM on Creek from the other side.
i used to hate bloc when i first started playing cod4.but now i dont mind it,now i hate creek.but the reason people hate it is prabably cause people camp hardcore.
Then again, I haven't played too many matches on Creek because I and everyone else always skip it.