I think Leisure is considered to be very of-its-time (shoegaze, madchester). It has this song on it (one of my favourite Blur songs)
http://www.youtube.com/watch?v=YdrFpPJgxC4
Modern Life is Rubbish, Parklife and The Great Escape are a sort of Britpop trilogy, so if you don't like Parklife (probably their most popular Britpop album) then you most likely won't care for the others.