I saw Oasis live at a festival last summer. I have to say they pretty sucked. They were halfhearted and didn't show any emotions. Boring, boring and boring.
I don't know why you had so good experiences. Maybe the rock the show at real concert and give a damn about such festivals.
Kosheen and Foo Fighters are fucking good live.
If I would be able to travel back in time I would love to see Guns 'N Roses, Bob Marley, Queen, The Doors and Nirvana live.