I sometimes feel that urge. Never did it though. To me it feels like a safe place, as if you can't 'fall any lower'. On the other hand, it would make my T seem far above me. When I think about people sitting on the floor it feels to me as if they make themselves very small, give their power away... I don't know if that's a right interpretation though.

But I may not be a good reference. I even used to sleep on the floor for a long time and loved it. Maybe I'm just weird.