Not the fandoms I was in before I was in fandom, but the things I was fannish about before my memory starts. (And my first dateable memory, I was two-and-a-half, so---)
Wee!me, basically, was fannish about: Sesame Street, Snoopy the WWI Flying Ace, and the Grinch.
Which is basically: muppets and people in furry costumes, many of whom don't speak English; dashing fighter pilots; and last-minute conversions to the side of good.
That is to say, goddammit, Star Wars.
and why hasn't anyone written a fic about Sesame Street: Coruscant where Big Bird gets a lightsaber
ok I was also fannish about Wall Street Week With Louis Rukeyser but I'm not sure how that fits into the pattern