Tough call, most of the ones I attended were work related so didn't have much chance to just sit back and enjoy.
Liked Aerosmith (not particularly a favorite) but got gassed out by the smoke machine, had to go backstage to get out of it. Poor production, good music. Alice Coopers shows were too over the top for my taste but still liked his music.
Springsteen, the only thing I knew about him was from one of my bartenders who liked to cue his stuff up on the system after hours, we finally took a nite for a live looksee and was impressed.
Most fun prior to 'working' was a Grand Funk Railroad concert at Cole Field House UMD, we all were standing on our chairs and just going nuts.
Needless to say this was end of the '60s into the 70's
Aero and Bruce were still doing small halls.