Ehh, crazy eights doesn't get me out of my head or loosen me up. It kinda has no effect on me.
I like Hot Spot, kinda for the same reason as Shay Shay Coolay: it forces me to be retarded and silly, and feel kind of embarrassed, and commit to it and own it. Hot Spot makes me feel uncomfortable, but in the right kind of way, by challenging the obstacles that hold me back.
If we're gonna start getting into warmups we hate, I fucking HATE the one where you think of a person you know and walk around as them, do some tic they would do, say some thing they would say, etc. I just sort of don't observe people in that way, and never know what to do. I always end up either getting singled out for having a hard time with it, or just fictionalizing someone more than you're supposed to in that exercise, just to get through it and move on. I can base a character on a real person's traits that I've happened to notice, but getting that specific is just beyond me. Same reason I'm bad at doing impressions.
I think that's literally the only warmup that like, I'd actively want to avoid.