I'll concur on Brain Candy. I thought it was "OK" the first time around; but the more I've seen it, the more it became one of my comic favs..
"Um.... right."
CW
Mallrats would be one of them.
I think a few of the other movies that really got me on the second viewing were films like:
Shawshank Redemption: loved it on the first viewing, but watching it a second time was a different experience; and now it is one of my alltime favorites.
Pulp Fiction...