Except that I don't watch shows with much romance
in them. ;)

The main reason I don't collect from series I
haven't seen is because 1) there are so damn many
of them that I would be forever lost looking at 
random cels, and 2) I have no emotional attachment
to the character in question, so I really don't
see any reason to own a part of them.

I mainly collect just cels from characters I like.
I don't make a point to collect from particular
scenes though, because if I like the scene I'll
recognize it when I see the cel.

In fact there are probably only two cels I own
which I really like the cel for the scene it's 
from.  The first is my latest Kiki cel (link)
and one of my new Noir cels (link).
I guess that Kiki cel isn't even that great from
anything but a scene standpoint, since you can't
really see her face, there's massive line fading, 
and the paint is even chipped off at some points.
But I really, really, like it because it's a very
emotional scene in the movie.  There are a few 
other cels I have in which I actually recognize
the scene, but that wasn't the primary motive of
mine to get the cel.

I guess I may be gravitating towards more scene-
oriented buying, because I have most of the
characters I would want to buy from the anime
I have seen.  Time will tell though.