My favourite thing to annoy people is when they hide their arm tight to their body and sit back in your HG to avoid the Twist Sweep or you sitting up to dig an underhook. I just sit up, connect my body to them using their gi or some sort of clinch preferably with a far side underhook then drop my full body weight back pulling them on to me into the sweep
Also any time you don't bother trapping the arm and they post but end up far diagonally across you it's possible to frame their armpit like an Elbow-push Side Control escape, get up on your free elbow and whip their knee out by pulling your pinch knees out a bit like a hip heist. It's another really cheesy sweep that annoys people no end