I'm not really clear on what you mean? How does it change when you pin it up? To look worse or what?
Edited because i read it over and over.
Yeah, I think my ultimate goal in a cut is to get it to look a certain way, if you consistently wear it up and that pinning changes it, I'd consider a different cut. For example, if I cut a lot of layers into my hair, and pinning it up on the sides made it appear shorter, I'd hate that.nid rather do less layers, less dramatic layers so that the shorter part wasn't so short. Kwim?