Well, speaking as a musician who also makes clothes, I find the analogy a little inaccurate...when musicians perform in public, they do so largely for the benefit of the audience, not themselves. When those same musicians go home and throw on some music, chances are pretty slim that the record they choose will be one of their own. I sure as hell don't sit around listening to my own stuff over and over again for recreational purposes...ok, I do know people who do that, but they tend to be fairly insufferable as human beings.
I'd attribute the lack of desire to wear clothing you've designed to a similar impulse. I wouldn't call it "boredom" per se...it's just that when you make something, it's usually for someone else. It's the same with many creative fields. Most painters don't ring their walls with their own paintings. Most sculptors don't fill their houses with their own sculptures. That being said, there
are practical reasons for a designer to wear his or her own clothing - promotion is one, and frugality is another (i.e. it's a good way to save on your wardrobe budget
). But I think designing what you like and designing with yourself in mind are two different things.