That happens to me with everyday stuff. I tend not to have strong opinions or preferences. I too have gotten in the habit of just making up my likes and dislikes so people will leave me alone about it. Where it causes problems is when I'm forced to make a decision about something and I can't see anything better about either thing. It really doesn't matter to me. I can see good and bad points in everything.
That said, I do understand the concept, but never really understood it intuitively. I was never someone with strong opinions.
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I don't suffer from insanity. I enjoy every minute of it.