I was never aware of Pink Floyd (except for the song "Money" which, at the time, I thought sucked) until after I left the JWs. The first album I bought was their last album together, "The Final Cut" and I worked my way backwards through their catalog. Over the years, I have probably worn out 4 "Dark Side of the Moon" albums and finally bought the cd.
I saw Pink Floyd in, I believe, 1987 (I still havent recovered my hearing) without Roger Waters and they were great. I saw Roger Waters in 1996 without the band and he put on an awesome show. Of the two bands, Rogers put on the better concert. Still, David Gilmore and Roger Waters are generals in the rock and roll army and the band was spectacular during its hay day. It never seemed to be the same, although it was still very good, once Roger Waters left.
If you ever get the chance to see either Pink Floyd or Roger Waters in concert, do it. It is a mesmerizing trip.