Your about me essay gives other users a first impression of who you are. This is a great opportunity for you to describe yourself perhaps on the surface or as deep as you would like to go. Details are key as other members may relate to you better the more they know about you. Some thoughts when writing your essay may be answers to:
Remember that each of us are unique and interesting. Try not to be intimidated but don't show off either. Try to be a specific as you can be while remembering who your target audience is. Remember you are trying to meet new people.