I didn't mention it because it falls into the Ranma 1/2, Sailormoon,
Bubblegum Crisis, Dragonball category. I would say those four and
Oh My Goddess! (which is, btw, one of my favorite comics and series)
are the most commonly used fanfic topics. Don't believe me? Go check
out the fanfic archives. There are a LOT of OMG! fics there if you
want to catch up ^_^ I DID mention Tenchi Muyo on my list, and it
is starting to join up with the "Big Ones" but it hasn't become
"All the Rage" yet. Another two that have always pulled their own 
weight but never (or not recently) had a HUGE boom in fanfiction
are Kimagure Orange Road and Urusei Yatsura. Does that clarify
things? ^_^

KOR and UY are the ones with the big-ass series, though.  KOC and
Hard KOR are still coming out, and UY:TSY exists, though many people 
deny it. :-)  There aren't that many *individual* stories with these
two, but the series are still going strong.

Except for Dragonball, btw, I have done or have an idea for *all*
these series.

--Sean Gaffney
--and of course, there's *variety*...