I don't think mine are particularly interesting, but I've been doing a lot of them since quarantine fried my creativity lol. This is the format I usually use, and I think Magnus' ref is the best I've done so far out of them. I like doing some headshots with different expressions bc it's more visual and I can show specific things rather than writing them all out. I also like to do little blurbs everywhere, either pointing out specific things in their design or just general info bc I find it more fun to look at. also, I know a lot of ppl like to do turn sheets but, one, I'm bad at them lol, and two I feel like I don't really need them for my purposes, it cuts down on the number of fullbodies I need to do too.
I also have a smaller version with no headshots if the character has less info, or if I'm lazy. I like to add some doodles or some kind of vague background to these too bc it makes them a bit more visual. Hope this helps!