Perfectionism...

"Perfectionism is Procrastination Masquerading as Quality Control."--Steven Barnes
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Anything worth doing well is worth doing badly at first. One of the worst mistakes you can make is trying to be perfect. I know people who routinely deprive themselves of valuable experiences and resources because nothing is ever good enough. People who won't finish projects because they're not "quite right." Now, this is fine for a while, but if you aren't completing the minimum amount of work to make progress, you need to see this for the pathology it is, and resolve to rid yourself of a potentially poisonous habit. You need to get to the root of it, anddecide what level of polish is necessary and desirable for the work or task at hand. If you reject people who aren't perfect, you may be resisting the hard cold look at yourself.

Failure is an absolutely inevitable part of the search for excellence. Trying to avoid failure, trying to look good, has killed more careers than lack of talent ever did. Want excellence? FAIL. Fail a lot.
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Many, many times I have embraced teachers who were imperfect. Know why? Because there aren't any perfect teachers. There are no perfect people. All you need is people with different resources than you possess, and the knowledge of how to acquire those resources.
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This does, however, raise another question: how do you filter out a teacher's negative characteristics? I had a martial arts instructor who chain-smoked. How in the hell do you absorb the value without picking up some of the negative? The answer is to find your emotional center, and learn to stay balanced there. Meditation is valuable for this. Self-hypnosis can also create a "guardian" personality whose job it is to keep you psychologically and spiritually safe. I would definitely suggest investigating this approach as well. Modeling is one of the most powerful NLP techniques, and Lifewriting embraces it wholeheartedly.