No one series or character makes up the majority -
- my cels are too spread out for that. 
Definitely, though, Weiss (Omi in particular -- I 
have more cels of him than any other character) 
and Treize (and by default, GW) are my two 
biggest sections. Cyber Formula comes in third, 
thanks to a lovely harem of Nagumo that I have.

A.