I never know whether to call myself really in the fandom for some of the biggies - I've read a ton of SGA fic, but I barely watched the show (I think some of the fics were honestly better). Same goes for Merlin, especially with Morgana apparently evil. :/ And I'm conversant in SPN mostly through fannish osmosis, because I am REALLY bad with horror and injuries and terrified people. (I tend to run away and cry in bathrooms during torture scenes.)

And, sweet irony, I haven't read The Secret Garden. :D So you aren't the only one with a childhood gap.

Clearly the answer is for you to keep running awesome challenges - one day I'll just have to pick a fandom you know!