Best concert you've attended

@rowd - it does get confusing with all those shows! 

I forget where it is, but somewhere on the internet is a list of all the shows that took place at Winterland; you should be able to find it. I was at a great many of them myself from Sept '73 onwards.... Bill Graham had enough juice that bands almost always played there on weekend nights. Those would usually be really good bands on those shows, even the support ones. 

Did you see Robin Trower there in '74 when Sha-Na-Na was the headliner? Robin tore the roof off the sucker, the place went nuts, and he was demanded back for 3 encores, and these were REAL encores, not pre-planned ones. I don't think many people remained for Sha-Na-Na. Came back to Winterland in '75 and headlined a Day on the Green later that year. 

Little Feat in 1973 or 1975 when they were at their peak and Lowell George was on fire. 

Bob Marley and the Wailers. Fox theater Atlanta, GA 1979.

I seen many others in my life. This one was by far the best. Almost spiritual

Soft White Underbelly (Blue Oyster Cult) at the Agora Ballroom Hartford CT. June 19, 1982. Only 150 people allowed inside. Stood center stage front row standing room only. Godzilla head right above the stage. 

Buddy Guy at the Iron Horse Music Hall North Hampton MA 1991

REO Seedwagon at the Hammeramith Odeon London England May 28, 1985 - strangist concern I ever went to - everyone stayed seated in the seats, no standing, no dancing in the aisles but it was still an awesome experience. 

Growing up in the '70's in Boston, I went to a lot of great concerts at the Garden.  Its really tough to say which was "the best," although I have to say that ELP's Brain Salad Surgery tour in December 1973 was a standout, as was Crosby, Stills Nash & Young at the Garden in 1976, which I thought was difficult to beat.

Shakti at the Berklee Performance Center in 1977 was transformational.  Put me on another planet!  But the most fun show was The B-52's at the Paradise Theater. Maybe 5 ft from the stage, dead center, sitting at the "record company" table with Steve Tyler and Rick Ocasek, it was just stupendous and everyone was dancing on the tables.  I have a bootleg of that show and brings a smile to my face every time I listen to it!  They were just phenomenal.