AC/DC -- 10/10. Not necessarily a big fan, but it was easily my favorite concert by a large margin.
It was in August 2009, I got a call out of the blue from someone I hadn't talked to in a while, he asked if i'd like to take an extra ticket off his hands. Since I'm not really a bid acdc fan, other than the big radio/bar songs, so I told him I wasn't sure and I'd have to think about it and get back to him. Figured that even though it wasn't really a big band for me, it was probably my only opportunity to see a big iconic band for the last time (I don't expect them to be back). So I called him back and accepted.
Get to the concert and dark storm clouds are rolling in. Middle of the show, a torrential downpour starts. Like, raindrops the size of marbles, probably the heaviest storm I'd seen in ages, my entire body was soaked down to the skin. Lightning lighting up the sky in the middle of their set, people cheering every time the sky lit up. There was so much water coming down off the top of their stage that there was a few inches of watching on the stage, stage hands constantly trying to clean it off the stage with squeegees (can't believe they weren't electrocuted). Brian Johnson (lead singer) pauses in middle of the rain and says "if you guys are willing to sit through this ****, then so the **** are we, do you want us to keep going?", or something along those lines, crowd went ballistic.
They played all the big ac dc songs that even non-fans know and love. Great energy from start to finish from both the band and the crowd.