In my opinion, Ween is one of those bands... there are very few of them... who are truly fucked up and capable enough to be a relevant creative force.
They're just a sprawling, scatter-brained blast of energy, with multiple personality disorder.
There are very few bands like them... few bands with the same tenacity, spontaneity, and actual musical ability. Among their peers are: Velvets, Beatles, SY, Lips, Beck, Pavement, and David Bowie, but precious few others.
I really like them, even when I hate them.