Not a specific band as such, but I was just a kid when my brother first bought / played Jeff Wayne's War of the Worlds album and I used to listen to the whole thing in one go. Loved it. In terms of live music performances, I thought U2 were awesone.
I have 2 older brothers, with fairly different tastes and wide range of music, but yeah between them they helped to shape my music tastes. Almost always had music on in the house when I was growing up.
Radiohead & Prodigy Couple of less known Electronic music acts I didn't know anything about but without planning to ended up seeing, who had unbelievable energy were a double act called The Presets and this French trio called dOP. I was also blown away by the Rolling Stones when I saw them, Arctic Monkeys were pretty ace and Kasabian I must have seen about 5 times and loved them.