For those of you that like to play repeating rhythms or collections thereof during jams, basic 12-bar blues, or some R&B improv, what are your favorites? 2-bar, 4-bar, minor variations as song progresses, turn-arounds, all welcome for discussion. Looking at rhythms, notes are a bonus. Thinking notation, 1e&a descriptions, audio samples, etc. to describe. What do you like to groove to?