Best concert: TV Girl last September. Saw it with my daughter and her friend and captured a lot of her energy in enjoying it. The vibe was great, their songs are clever. Live version of "heaven is a bedroom" was awesome.
More mainstream band/artist: Peter Gabriel in the late 80s/Van Halen/ aka Van Hagar during the 5150 tour (saw them three times in one weekend)
Worst: His Name is Alive in the early 90s when i wasn't really understanding the indy vibe and made some jackassy "play Freebird" like comments during their slow numbers. So really that was a me thing not a band thing.
More mainstream bands/artists: Way too many Rush shows because all my nerdy friends were on must see basis with them. I love them but i was tired of it by the end of their run. "Oh they are playing the Spirit of Radio, yay..."