Hmm... I have actually found a few really good series when I got interested in people's avatars, and checked the file names of the avatars to find helpful hints.

I honestly doubt my avatar is that interesting to anybody, but to make this post valid I suppose I can tell it's not even from any show; it's a detail from a postcard that once immediately caught my attention because of the idea and graphics, and I bought it with no intention of ever sending it to anybody.