First--Pete Seeger in 1959 or 1960 (my dad took my brother and I when we were 5 and 7 respectively). Still have memories of that.

Best--Richard and Linda Thompson Theatre Royal Drury Lane Nov. 1975 (only concert I've ever been too where I completely lost track of time).

Last--Richard Thompson, 1000 years of Musical history tour at College of DuPage about 1 year ago (don't get out to see a lot of live shows, because we're usually out performing)

Worst--Three part show at the Aragon Ballroom in 1978 or The Fabulous Poodles, The Godz (the only band that ever was heckled where I didn't feel sorry for them), and The Ramones.