Jeez...good question. Some bands I've seen more than I can count.
Double digits definitely include:
Bob Mould/Sugar
Social Distortion
Sonic Youth
Echo & the Bunnymen/Electrafixion
Goo Goo Dolls (yes, I hear a collective snicker...but guest list + backstage passes= lots of free fun)
The Pixies
Others that are not quite double digits, but I've seen at least 8 times:
Queens of the Stone Age
Oasis
Belle and Sebastian
Catherine Wheel (I may have seen them 10 times)
The Judybats
There are a bunch of others I've seen like 7 times (maybe more): Blur, Face to Face, Smashing Pumpkins, KMFDM, Frank Black, The Charlatans UK, Buzzcocks, Yo La Tengo, etc.
Most embarassing band I've seen? Probably Chumbawamba. Twice. One time a friend of mine got back into the country and I didn't realize what I was getting myself into because she wanted to go, the other time Lily and I got dragged by a friend of hers. Good gawd. Talk about painful.