Neonchameleon
Legend
To me, crunch both gives and takes away. The longer something takes to calculate (and looking up is worse - I'm looking at you, Rolemaster), the more it takes from creativity. On the other hand, crunch can give back a lot in fluff - again, Rolemaster's injury tables - or the pushes, pulls, and slides in 4e. And those give hooks to hang creativity on in a way that not having them wouldn't.I've struggled with this as a player, but especially as GM - it seems like crunch-heavy systems suck up mental energy I'd otherwise be using for fun roleplaying & creativity.
What causes problems for me is when there's a distinction without a significant difference - i.e. the differences take too long and too much brainpower to resolve for only minor differences in results (spending any time to resolve something utterly irrelevant comes under this heading). Or when the ruleset ties you to doing something that isn't how your character would act.