If you're in school to perfect your hobby (ie, stuff you do for yourself), then that's your choice. If you're in school to learn a trade/craft/skill which you will use to earn a living, then you learn to do whatever has to get done. Of course, you may decide that you accept only certain kinds of clients and only certain kinds of assignments, but that is a priviledge one has when one is well-established and earning money is no longer an issue.
As for your having high standards, nothing wrong with that. But don't mistake your views/opinions as being representative of others. You may, in fact, be producing excellent work, even if you're not excited about it. In the commercial field, it is useful to step ourside "yourself" and try to see things somewhat more dispassionately. As has already been noted by others, if you are hired by someone, you are there to professionally execute their vision to the best of your ability. Do it well, and you'll have lots of time to pursue your real love or interest.