They call it Country too (except for Paradise by John Prine, which they say is bluegrass) but I was just amazed at the differences in instrumetation and song and chord structure when I started listening to it all. And the bass line on Bob WIll's & the Texas Playboys' version of Milk Cow Blues is much closer to jazz than either country or blues.

Yes, they definitely play what they like. Almost all their gigs are volunteer, because "if someone pays you to play then that person thinks they can tell you what songs to play, and we only play what we want to play." They play together because they enjoy it, and if someone starts telling them what to do it will take the fun out of it.