I, uh, have cels from 35 different series in my 
gallery. *35*

If I *had* to limit myself to just three (ow!), 
the first two would be obvious, as they're my 
fullest galleries.

Weiss Kreuz ~ 47 cels currently; yes, the 
animation sucks and the plotline's flaky, but I 
have an unholy affection for this show, and for 
Omi in particular.

Gundam Wing -- 18 cels currently. No army's 
separating me from my Treize cels. Ever. End of 
story. They're my finest cels, bar none. ^_^

As for #3 ... we'll skip over my next most 
populous gallery (Cyber Formula) to the next one 
down -- Ai no Kusabi. Again, crowbars and 
vigilantes aren't going to part me from Riki and 
Iason and Katze, even after I quit collecting. I 
*love* the character designs, and my emotional 
attachment to the story itself is pretty strong 
(yes, it can make me cry, depending on my mood 
when I watch, or yell, as is typically the case 
when Guy's on-screen).

That's still about half my collection, 
thereabouts. But gah, I'd rather get to keep my 
Yaoi cels as a whole section to themselves. ^_^