1) Bugs Bunny Vs. The Borg-
 A Star Trek:TNG/Warner Bros. crossover.  It's one of the 
first fanfics I've read and one of the best.  And one of the 
longest. [about 700k]  No anime content, unfort.  Also, I 
can't find it anymore, so I can't credit the author.

Uh oh.  This sounds almost as bad as my Knight Sabers vs. Barney spam.
:P  (was only about a page, although now you've gone and given me
ideas...)

Oh no...this wasn't a spamfic.  No spamfic would get my #1 pick.
This was at least 100 pages long.  And really funny.
It might not be a normal idea, but it certainly wasn't a bad idea.
If anyone has a copy of this, though, please send me it.

Terry