I've read a few similar things in the past, but my web wanderings today let me to You Don't Look Like a Librarian, a presentation given by Ruth Kneale, a fellow Arizona librarian. I enjoyed her informal way of presenting the information.
You know, I didn't realize one needed a Master's degree to be a librarian until college - I was a student aide at the Music Library and on the posters for my recital I put "Anali the Librarian". The music reference librarian really took me to task over that. Come to think of it, she was a main factor in my hesitation to go for my MLS. That has been a few years ago, but I'm not certain that it's a more well-known fact now than it was then.
Clearly, one can't be a librarian without seeing some of this: my friends gave me the Nancy Pearl Action Figure for my birthday - my husband jokes that I should get horn-rimmed glasses. I rarely get surprised responses when I tell people that's what I do, though, so I guess I fit their perception - whatever it is.