I keep receiving invitations to join Linkedin. Finally a fellow Grumbler sent me an invitation and I figured, what the heck? But even though I seem to have been accepted after entering a password (without any personal info) I stopped the sign-in process when I could not decide what category to place myself in. Arts and Crafts, Design, Retail? Why don't they just let folks write in what category they wish to be placed into? I have quit numerous applications just for this reason (including popular search engines). If they do not have a category for you - what category do you choose?