Not quite sure if this is what you were getting at but there have been times in my life I have obsessed about doing something or an object to the point have routinely played make-believe in my mind about doing so. There have also come times when I have developed a case of nerves about them. I chalked this up to being worried that the thing wouldn't live up to what I assumed or wanted it to be.

I haven't done this though for years. I assume it is because I am relatively content at this point with my life.