Ooh, finished the Census 2000 and now this!  ^_^
Ok, here I go...

1)  about 3 years, before that I didn't even know they sell cels!

2)  anywhere from $0 to way, way, wayyyyy too much

3)  hmmm...all of them! (check out my site, ^_^;;;;;;;;

4)  anywhere that sold me cels are my favorite ^_^

5a) mostly but not strictly specific characters

5b) depends, ^_^;;

6)  yes, eBay

7)  yes ^_^ (at least they enjoy looking)

8)  yes, only anime/manga people friends though.

9)  love the anime, love the fact that you're the only one
person in the world to own this one of a kind cel (provided
it's a prod.cel, of course) that was used to make that 
beloved anime.
It's like "love me, love my cat" type of thing........ what'm I talking about?!!! O_o
Ok, 4 words:  "they are so beautiful!!!!!!" (^o^)/