I think most people think that once you've found a hairstyle that looks good on you, you should keep it. Forever. I am not one of those people. No matter how good something looks, at some point, it's got to change. Even if the change isn't flattering, it's still interesting because it's different.
I am personally in phase 1 of a 2 phase cut. It could be pretty horrendous when all is said and done (I am going for short, bangs, and layers the length of a matchbox) but hair boredom will be cured....at least for a few months anyway.