Other good ones: Moody Blues (extremely trippy, but awesome nonetheless); Yes; Elton John (in his younger days, LOL) Neil Young; Crosby, Stills, and Nash; Beach Boys (also in their younger days); Comes With The Fall (these guys ROCK); 12 Stones; Stereofuse.
So-so ones: RHCP (sorry, GGG
); The Distillers, Jurassic 5 (just not into their stuff); Linkin Park (also not into them, though I have seen worse); Deftones (wayyy too much screaming).
Bad ones: Limp Bizkit (even if they were virtuosos, I still would hate them, LOL), Mad At Gravity (reaaaaally awful live).
I'm with you, Said Eyes, you have to be god-awful to make my bad list because I looooove live music.