Watch the Three of Four Rhythm online guitar lesson by Oz Noy from Twisted Guitar: Blues Rhythm
Let me show you what I just did in "Three of Four Rhythm". This is a 3/4 groove, kind of reminiscent of "Manic Depression" by Jimi Hendrix, but the chords are minor, going from Ab minor to Gb minor.
With a Hendrix-style blues like this, a lot of times there's a bass line that's doubled by the bass player. So, we'll go through the bass line pattern, and then I'll show you a bunch of chords that can be played on top of it to create all sorts of different colors.