
I've also suffered from mental illness for most of my life, and anime (to be precise, Neon Genesis Evangelion) has been instrumental in my survival and recovery. I wrote a book about my experiences, the chapter which deals about anime is here :
http://www.tomato-of-justice.com/anime-no-daibouken/
It does provide a look at early fandom, but it's wider content is in the book that it is part of. I didn't want to plug that too hard, but you are certainly welcome to read it. The link is to the chapter about anime.
I hope you get something of it and enjoy my writing. Have a nice day!