Favorite Pink Floyd Album

I would have to say Dark Side of the Moon.  It tells a story using simple non musical instruments and production techniques to set the mood.  I like the next 3 albums as well but Waters tightenened the grip as time went on.  

Animals is my single favorite album of all-time.

ANIMALS. 2u/2u 

The Wall. 
#2 would be Animals. 

Wish You Were Here.  The 50th Anniversary reissue released last year is excellent.