Interesting everyone saw mostly rock shows.
 
In addition to the pop acts I've seen
 
Tal Farlow
Modern Jazz Quartet
Sara Vaughn
Barney Kessel
Tanglewood (of course!)
Oregon Sin-phony
Manuel Barrueco
Adam Holzman
David Russell
Edward Flower
(and many, many  classical guitarists you've never heard of)
George Benson
Herb Ellis
Sonny Rollins
Stan Getz
Gerry Mulligan
Jimmy Giuffre
Clyde Criner
countless local orchestras
 
 
 

Eph just reminded me.  I've also seen the Rippingtons.

No way I'm going to get this right the first pass:
 
Kiss (6 times, first in 1977)
Rush
Pink Floyd
Eric Clapton
The Police
AC/DC
John Mayer
Dokken 
Dio
Motley Crue
Poison
Ratt
Damn Yankees
Ted Nugent
Skid Row
The Scorpions
Judas Priest
Saxxon
Rob Thomas
Plain white Ts
The Romantics
The Fixx
Violent Femms
U2
Kanya West (I want that hour of my life back please)
Roger Waters
Michael Lee Firkins
Queensryche
Armored Saint
Eric Johnson
Alice Cooper
Firehouse
Tesla
REO Speedwagon
Def Leppard
Great White
White Snake
Third Eye Blind
Collective Soul
Fleetwood Mac
Iron Maiden
 
Added:
Joan Jet
Loverboy
Slash
Styx
Kansas
Pat Benatar
Eddie Money
Ozzy Ozbourn
 

smallstonefan
No way I'm going to get this right the first pass:
 
(Several bands that actually play music)
Kanya West (I want that hour of my life back please) 
(Several more bands that actually play music)

 
What crime(s) were you being punished for???! 

craigb

smallstonefan
No way I'm going to get this right the first pass:
 
(Several bands that actually play music)
Kanya West (I want that hour of my life back please) 
(Several more bands that actually play music)

 
What crime(s) were you being punished for???! 

He opened for U2. IMHO, they sucked too and I wouldn't mind getting that hour back as well. Worst concert I've been too... 
 
PS: I ALMOST didn't list him as it was so embarrassing... LOL

eph221
Interesting everyone saw rock shows.
 

 
Not true if you read the lists closely.

Another one I forgot, and is a recent one too. Irish band Aslan, very "big" in Ireland at one time apparently were at the anniversary of McGettigan's bar in Dubai. I had not heard of them but they were quite good and large sections of the audience were very familiar with their hits.
 
I missed Mary Black at the same venue as I was out of town.

KenB123

eph221
Interesting everyone saw rock shows.
 

 
Not true if you read the lists closely.

True!  Paper and scissors shows were included.  

kennywtelejazz
My list is a little Kooky 
There's more but once you see my list you will see I don't get out much these days .....
Led Zeppelin 5 X
The Clash

A great list Kenny - but these two in particular stand out to me! :) Would have LOVED to see both of these!

craigb

KenB123

eph221
Interesting everyone saw rock shows.
 

 
Not true if you read the lists closely.

True!  Paper and scissors shows were included.  

Kenny and Ken are the only others that mentioned non traditional rock (I include blues in rock).  And no one mentioned classical.