Some of these will/will nots are flexible. (For example, light feet and watersports are okay if they're in service to humiliation, for example.)
Additionally, for rp length, I prefer whatever is appropriate for the moment. Sometimes you do a lot of one liners during conversational scenes, and sometimes you need to take several paragraphs to set up a scene.
I also prefer to loosely plot out what an rp looks like before we're writing it so there's something to aim towards.