A blast from the proverbial past:
Probably the film I have the single most positive associations with overall, whether the process of making it or the reaction or anywhere in between. Of course, if we'd known then what we know now (about the power of good preproduction work [i.e. Screenwriting, etc.]), then, in theory, the movie could have been a lot stronger.
But I think it all comes out pretty strong in the end anyway. And who knows? if we had thought things through ahead of time, we might never have gotten to see Matt Stone in a dress.