Every one of us has a perfectionist inside. Still we often do not see the consequences of the dark side of our design. Some common everyday issues may turn into real problems and affect us. If you think reasonably, it should not be a problem to do some simple things even if you assume they are not 100% right. But not for a perfectionist! You may become depressed even with minor mistakes, which one might not even consider to be a problem. It should not always be a fear of a bad result, but also a fear of making a decision.