Re: Your favorite live concert
Lollapolooza in '93 was good: Tool, Fishbone, RatM, Alice in Chains, and Primus in one show (plus a lot more less notable). Although... I can't seem to remember Fishbone or RatM... but I'm told they were in fact there, it was a long, drunk day. I remember falling asleep in the middle of the main field while Dinosaur Jr. were playing...
Ministry was great, but more so for the opening bands: Sepultura and Helmet (Arise and Meantime era respectively).
Tool in 10k Day tour in 2006 was great.
Opeth two months ago, but I wish I had seen them on the previous tour when they were still a metal band ;)