Starting up a blues and blues rock band, just wondering what are the very best BLUES songs, we have plenty of blues rock songs, so yeah, everyones favourite blues song

Cheers guys
mannish boy- muddy waters
It's always the last day of summer and I've been left out in the cold with no door to get back in
Killing floor- Howlin' Wolf (but Jimi's version is pretty schweet if you can pull it off)
It really depends on the band playing the song, and even then, it's pretty subjective.

Any well done slow blues is always good though..