I often find myself observing people. And, I do sometimes recognize signs of OCD or bi-polar traits in others.
I also watch the "happy" people, and wonder what's going on in their lives. Are they really as happy as they seem? I know all of us struggle with something, and sometimes I just wonder what's really behind the smile.
This morning I attended church, and our minister spoke about the woman in the bible with the ten coins. She lost one, and tore her house apart looking for it. I thought to myself.....she was OCD, she just had to know where that one coin was......LOL
Have fun with your people watching. Sometimes it helps us to see we're not alone. And, as long as we don't comment, it really doesn't hurt anyone.