I guess there's nothing wrong with them to some people. Being a musician myself I despise them for flogging an already passed genre. Why can't they evolve musically?
Nine Inch Nails are amazing because Reznor was the first to say, 'Rock...computerised music...ok' and meld them together in the fashion that he did.
Tool are amazing because they are epic, rythmic, haunting and structured tightly. They live up to their motto, 'We are for advancement, not revolving. Think outside the square and make your own square.'
The Pumpkins ARE (they are back together :P) amazing because Corgan is that 'multi-sided' that he brought in so many different sounds and song styles into the band, not just the same sound over and over.
Don't mind me Charms, I'm just a jaded, over opinionated muso