At the prompting of Patti Digh (and life, and timing, and the universe), I'm doing one thing every day for 37 Days, and sharing that journey here. You can read about what I'm doing in this post.
A partial list of the concerts I've been to, in no particular order:
Crosby, Stills & Nash
Simon & Garfunkel
The Grateful Dead (many, many times)
Stevie Ray Vaughn
Adrian Belew w/The Bears
Adrian Belew (solo)
Pink Floyd (with Roger Waters, before the split)
The Allman Brothers
Little Feat (many times)
The Rolling Stones
Steve Miller Band
Mary Chapin Carpenter
Bruce Springsteen & The E Street Band
Jerry Garcia Band
The Bee Gees
King Crimson (w/Adrian Belew)
Bela Fleck & The Flecktones (the first time I saw them was also my first acid trip. Holy moly.)
Medeski, Martin & Wood
Loudon Wainwright III
Reel Big Fish
That's the big, national acts; I've seen many, many local singer/songwriters and bands, too.
There's nothing else like live music.