I did the same. I filled half a notebook with all my character’s powers, enhancements, bios, badges, costumes ... basically every detail that seemed important. The data became somewhat less comprehensive after the first 10 or so characters, but the bones are there for everyone.
My only problem at this point is that I have since moved and that notebook is entombed in one of several dozen boxes of books in a bigass storage unit. This homecoming came upon me so suddenly that I haven’t had a chance to go and literally dig it out of a mountain of crap.
But it’s a testament to the game and the mythology building it inspired that I’m gonna go do that very ridiculous thing. In the meantime, I’ll make some new faces and see what happens.