There's this really weird feeling that I get when I learn choreography that was created on someone with a completely different habit of moving. It's like I'm trying to fit myself into someone else's skin, and it's all tight in the strangest places, and has residual demands for nuances I would never notice, choices I would never make. Dragging and getting dragged at the same time. Everything feels like it's the wrong size.
And then it's all subsumed by familiarity. Practice sands it down to fit onto my body, to indulge all my habits, tics, and velocities; and it feels so much less like I've got my shirt on the wrong way and my shoes on the wrong feet.