Love a bit of Floyd.
I have Dark Side of the Moon and Wish You Were Here on vinyl and have listened to them regularly since I was about 15 years old.
I guess with prog rock bands it's difficult to pick individual tracks. I always enjoyed the track Time which fades into the Great Gig in The Sky on the first side of Dark Side of the Moon.
Fearless from the album Meddle is also a good stand alone track
Also used to enjoy a lot of early Floyd and some of Syd Barret's solo stuff (yes, I had long hair and wore flares when I was younger). Interstellar Overdrive is good track