I always use Rinoa's name from Final Fantasy VIII as my username on every MMORPG I have played. But her name is too common on PSN so I decided to use my favorite character from a certain MMORPG instead as my PSN ID. Only a few people in the internet knows where I got my username.
http://www.youtube.com/watch?v=otQEKPKNDG0 --- "Women don't stay in the kitchen to make sandwiches." Sign up now! Posting in the forums makes a difference.