Maybe I'm just some kind of freak, but I hardly ever get my hair cut. Seriously, like once a year. When I do, it doesn't seem to change my curl pattern at all, and I only get it done because my hair is getting to the "freakishly long" point, not because it's looking mangy.
Maybe this is because my hair is extremely fine, so it doesn't weigh itself down? I'm not sure. At any rate, there's never any huge change that happens when I chop.