I have a site I started a while back, Best Concerts - a Wiki actually. The response has been luke warm so I thought I would post this question and post up some of the experiences myself. thanks
"best concertness" - Weird Al Yankovich, however that's spelt. "just plain awesomeness" - Rammstein. Lotsa fire
I am an avid concert attender about a few dozen a year, best ones that stand out and I would always see again are Metallica, Aerosmith, Three Days Grace and the Tragically Hip
I have attended concert by A. R. Rehman and was thrilled with the music he presented to us. Atmosphere was electifying.
I would love to see him, my fav is amish paradise and white and nerdy. These days that must cost you some serious dough! They must be in their 60's? Great music though! I guess I should add in my favourite concert....I would have to say a toss up between KISS and Ozzy Osbourne