I'm gonna answer this slightly differently to the OP question because I don't really think these below things should be embarrassing, but I found them embarrassing in the past(and no longer care what other people think). (Also I had already written out this before I double checked and saw the question wasn't as I had first thought.
Enjoying drinking cocktails or "girly" alcoholic drinks (taste better than piss i.e. beer), not being straight, playing "childish" nintendo games, and being underweight. I've come to learn that what other people think on these matters and other similar is their problem and not mine.