What does a Librarian look like?

I got to thinking about the stereotypical image of a librarian after my last Second Life Virtual Librarianship class and then saw a link to these pictures on Flickr. We had a somewhat heated discussion about the need for librarians in SL to dress up their avatars (or not) and the fact that finding clothes and changing one's appearance had been covered at the beginning of the course. One of the participants thought that appearance was not important as she was there to learn how to provide a service to her clients. The facilitator, Puglet Dancer, was of the opinion that her appearance was very important to her and often led to her making business contacts might not otherwise have come her way.
In many public and college libraries staff tend to dress casually and normal business standards of dress don't apply. I think appearance is as importance in SL as it is in real life and love the opportunity the virtual world gives me to look young, wear stiletto heels and change my hairstyle as often as I want. In RL I also try to dress well without reverting too often to "twinset and pearls".