I'm a big (Z). well that could be any number of things I probably call myself daily. So no lose there. Also gone is the "if I don't do (A) then I can't do (B). I'll just do it anyway. NO RULES and the like.
The primary motivation could be the satisfaction that comes with completing something within the timelimit. At least it kind of works for me, as I've discovered today. Like reading two pages in 8 minutes rather than 30...
So I kinda have an almost completed picture and I'm to tired to hate it, but sleep will fix that. Guess I need to color it now Sleep time now