Pretty much this... Progression is important and inches are part of that, I just don't feel the need to tape measure, i know in my head if it big for me or not and I know if I am progresing in that area But to me progression is way more than just inches (and I am not talking about tricks here, although that is progression too) , carrying on from HASMS's post - trying a move with a crap run up, been able to spot a new line (especially in well ridden area's), working on smoothness, less set up hops, trying moves in different situation (like an up to front from a steep bank, instead of flat), to name but a few