I also like pan cel because mostly these cels 
show nice shots of one (or more) charakter(s). I 
by myself have two cels that fit this category, 
both from the Wedding Peach series, one A1 END 
Cel from the TV-series (which I have framed 
because of the simple fact my cel-book was to 
little for the cel to fit in, cel size is approx. 
50x30 cm), it looks really great and one hanken 
mono which I also want to get framed.
But unfortunately framing a cel professionally 
tends to get very expensive due to the used 
materials (UV-glass etc).
But I also agree with the others here, pan cels 
are mostly more detailled than normal standard 
sized cels and show the charakters on it often in 
very cool poses so therefore I like them.