actually yes, I do. Always thought Morrissey was a bit of a tos ser and never really liked his music (apart from Every day is like Sunday, for soem odd reason), then saw him on Jonathon Ross and I still think he's a tos ser. And a pretentious one at that - 'I never perform Johnathon!' etc etc.
Conversely, went to see PSBs in concert two years ago and didn't expect much....Neil was never a great singer etc. But I was blown away by them, as was the whoel group of us who went. One of the best live gigs I've been to.
Guess it depends what floats your boat.