I don't even know all of their albums. I only listened to Umma Gumma once or twice. I love Roger's song. ^^ Several Species... It's brilliant and very very creepy. Weird guys... And anything after The Wall. I only know some songs off The Division Bell, my favourite is What Do You Want From Me? Might be progressive gospel. That should be my new favourite musical genre. And then... I think I know one song off The Final Cut, but only subconsciously. I think it was on the radio one day and I recognized it.
I loved The Wall and The Divison Bell. As for The Final Cut, well, I need to listen to it again to decide. It's hard for me to choose a favorite Pink Floyd song since I usually listen to their albums as whole, rather than a choose a song or two.
You never listened to The Dark Side of the Moon, or Wish You Were Here, or Animals? You should! Start with The Dark Side of the Moon.
The only Pink Floyd song I've ever really listened to is Wish You Were Here. I think I'll go DL some albums if there is that kind of hype of it.
You could always try other stuff by Pink Floyd. Wish You Were Here is a great song, but far from my favorite. Try to listen to their albums rather than song. They usually compose albums as a whole. Their albums are like...plotted, if that makes sense.