A think i loved in noel's music is that he used to change a little bit the riffs in the songs when they were played live. He was more like free-jamming in his songs and i guess this is why all of us we love oasis's bootlegs, because the songs were never exactly the same!
The last few years that changed a bit, like noel is getting more and more lazy on his live performances. But anyway, this is what i like the most in his music