David Gilmour or Roger Waters??

Gilmour coz a like guitar

I don't think that is even a comparison. David Gilmour joined the band to take Syd Barrett's place, after he dove too heavily into LSD. Apparently he would just stop playing and stare off into space, etc... Eventually, the greatest form of Pink Floyd would form, with both Roger Waters and David Gilmour. Great Article: http://en.wikipedia.org/wiki/Pink_floyd