For me Mountain Climbers are at the top of the list! Lateral jumps really seem to bother my knees so they come in a close second with Tuck Jumps.
Measuredoak~ I laughed out loud at your post because I could so see myself doing the same thing. I can finally do fast feet shuffles but when Cathe adds the arms I stumble all over the place. I am right there with you on the coordination issues!
Burpees, straddle taps, tuck jumps, and those blasted Genie hops could all fall off the world and I'd be ok with it. But, yes, we do them anyway.....