I think my favorite part of swapping has been forgetting how Windows does things. I'm so embedded in Linux and how it works every day that I don't remember where to go for certain things in Windows without having to search.
I remember some power user shortcuts like run prompt shortcuts (appwiz.cpl or control userpasswords2) but I used to be able to walk people through how to get certain pages in the Windows UI, and I couldn't do it today.