Here's a bunch of blues tracks recorded in the studio with a live band that I commissioned a few years ago:
http://www.youtube.com/user/FiniteBlues .
I don't mind playing with MIDI bands if the atmosphere is interesting, but live really makes it for me. There is a lot of information conveyed in a live performance that is missing from every MIDI backing track that I have heard. Real musicians don't copy and paste anything.