Sure, plenty of people think they're ugly, but I can't remember how many times I've heard people say looks are the least important thing when considering a new bass.
Other than that, I usually won't even pick up a bass and plug it in for a trial run if it doesn't catch my eye, and when it comes to Musicman basses, I think the Bongo is their best design.
Of course, there are some basses do find ugly.