I remember reading your post and identifying with 
everything in it.  Really, you put into words 
what I was feeling in my heart.  Especially this 
part:

The desire to own things (i.e., cels) is 
dangerous, because you can never have enough.  
You have to make sure that you're not misplacing 
that desire that really ought to be tied to 
something else.

I think many of us felt that soul-deteriorating 
feeling when we acquire too many Things.  And I 
think that this "hobby" makes it extra-hard to 
avoid being overly materialistic, because it is 
all about the acquisition of Things.  That's fine 
in moderation, but we tend to celebrate 
materialism here.  And every time someone 
says, "I'm addicted and I love it!", I worry that 
some impressionable newbie might buy into that 
mentality, thinking, "the people who are saying 
that are seasoned cel collectors, so that must be 
a key to their success."

I'd rather that people say, "Isn't this piece 
gorgeous?  I can't stop staring at it; the art is 
so compelling!" than say that they're addicted.  
I think it's nicer to have a postive sentiment 
embedded in the groupthink than a negative one.  
^_~