the wall and dark side are my favorites but in my opinion not the best ones.. i'd say animals as well
A lot of people seem to think it's overrated, but I think The Wall is the best. It has a certain feeling that no other album or song by any other band comes close to. I have to listen to the whole thing, it's like one long song. Animals is great too.
After thinking about it I conclude that my favorite one is whichever one I happen to be currently listening to.
I think there best ones are the dark side of the moon wish you where here animals and the wall. But I have to say. i love most of Floyds music each album is interesting and unique in its own way.