I used to have something similar to this, as a teenager. I pretty quickly realized I was drawing arbitrary lines delineating things that I found cool as being b

I used to have something similar to this, as a teenager. I pretty quickly realized I was drawing arbitrary lines delineating things that I found cool as being better than things other people found cool, treating other people's interests as somehow more embarrassing than my own even though I was a textbook cargo-pants-wearing wannabe-hacker nerd. Between that and my struggle with depression, I ended up deciding that it's more important to enjoy things than to look cool. Anyway, to answer your question: I'm not sure there's any personality traits I would call "embarrassing". There are some I would call harmful, sure, and there are some that are associated with being socially inept or less cool, but I don't think there's a category of personality traits that are just embarrassing. To your specific example: Being enthusiastic about things isn't embarrassing; it invites others to share that enthusiasm, either because of a shared interest or simply because watching someone be enthusiastic about something is enjoyable.