Most SPs have facesitting on their likes list. In most punts, if I'm enjoying RO I'll ask to move on to facesitting.
Headscissors is a bit more niche. As I've got older, the second pop needs a bit of help and I discovered that a headscissors handjob combo does the trick. Having lovely thighs wrapped round my head is awesome. I must have explained the position to a dozen or more SPs and they've all thought it was cool - after all it's just a HJ.