Heh, doesn't this describe all my collecting 
habits?  I'm actually shocked that I managed to 
FIND cels one of my primary "never expected to 
see a cel in a million bajillion years" wishlist 
series: Ninpen Manmaru!!!  Of course, I'm still 
looking for more, but I've been searching for 
cels from that series since 1997/98, so I'm very 
happy to finally get a couple!

As for what I'm still looking for, here's a 
partial list of things I can think of right now:

Nintama Rantarou cel of Rikichi Yamada
Nintama Rantarou cel of Shuusaku Komatsuda

  These two characters are my favorites, and 
unfortunately it seems like cels are just 
impossible to find.  But someday maybe I'll get 
one.

Dragon Ball: Red, Black, and Yellow from Red 
Ribbon Army, tv series versions

Macross 7: Exedore (yeah, right, I'm gonna find 
one of those)

Bell of Chirin: It was a sanrio movie about a 
young sheep who ended up becoming a "wolf", never 
seen a cel

Hamuko Mairu!: a short film released at the same 
time as the Nintama Rantarou movie based on 
characters from a short manga series also by 
Amako Soubee (creator of Rantarou)

Sukeban Deka: I want a cel! ^^

I'll think of something else later.