I too thought "Groundhog Day" was going to be an easy winner. The kids still haven't caught on to Bill Murray yet. However, I am scared they like Pauly Shore, because we'll have to watch all his films if they know he's got more.
In their defense, they have pretty good taste in movies generally, still can't find anything they like more than Police Academy. They really like Chris Farley and Jack Black, but we've watched nearly all of their films together.
I am hoping to turn them onto John Candy soon, perhaps via "Uncle Buck."