My dad was really into it and used to play it a lot while I was growing up. I've got a few blues albums but I have to be in the right mood to listen to it.
Favorites include the following:
Muddy Waters
Albert King
Albert Collins- I have a album he did with two other blues guitar greats, Johnny Copeland and Robert Cray, called "Showdown" that has some awesome guitar playing.
John Lee Hooker
Johnny Winter - Drug use has ruined him and left him a shell of the man he once was, but go and listen to some of his early blues/rock albums. My favorite is Second Winter. He could play a mean slide guitar.
Stevie Ray Vaughan