Back to names with a lot of punctuation, !!! annoys me. It would have helped if I liked their music, but I sold the album back within a week.
Best band with a horrendous name:
Masters of Reality
Don't forget Neutral Milk Hotel. One of my favorite bands, but I think their name dissuaded me from listening to them for quite some time.
IMHO, the worst name of a band EVER: Vertical Horizon. That sounds like a name I would have come up with in 9th grade.
Speaking of which, someone should start a thread about names of bands they were in in high school...if it hasn't been done already.