Ok I'll start with ppl I've seen live as this must mean I like them more so......
Stereophonics
Eminem (My teenage days)
Offspring
Green Day
Oasis
Kasabian
Twisted Wheel
The Stone Roses
The Vaccines (so much better as a live act)
Nero
Noah and The Whale
The Black Keys
Snow Patrol
Artic Monkeys...