What is the most memorable concert that you had attended so far?

In no particular order:

Gram Parsons and Emmylou Harris at Max’s Kansas City 
Jefferson Airplane and Hot Tuna at Columbia University 
Jimi Hendrix at the Fillmore East (the New Year’s Eve show that was recorded)
Bruce Springsteen at Max’s Kansas City (after his first LP)
Bonnie Raitt at Max’s Kansas City (see a trend?)
Cesoria Evora at The Bottom Line
Judy Collins at the Tarrytown Theatre
Joni Mitchell Arlo Guthrie double bill 
any of a couple dozen shows produced by The World Music Institute in New York City. 

I forgot one:

Miles Davis at The Bottom Line. During his jazz fusion era, maybe 5 years after Agartha recording. 

I just remembered a few more, and how could I forget these:

Astor Piazzolla - at SOB’s. I was sitting near the stage, he invites a special guest onto the stage, a petit but statuesque woman sitting right next to me, elbows apart, at the next table gets up and steps up. It was Grace Jones. 

Tito Puente - at SOB’s

Kid Creole and the Coconuts - A club in Chelsea, can’t remember the name 

Johnny Winter - the show was in the gymnasium of my Catholic high school. 

As a rule, I prefer small clubs. I almost never go to large venues, the football field at Columbia for the Airplane, and MSG for Dylan (a horrible experience, that probably turned me off to stadium concerts once and for all), and MSG for the Eagles (6th row center, comp seats or I would not have been there). 

Central Park for the Summer NY Philharmonic concerts are always fun, but you go there as much for the picnic vibe with 100,000 fellow NYers.