I think my favorite is Monster Bash. I love the Universal Monster theme, and the colors and design looks great IMO.
My least favorite would probably be Demolition Man, you know... with the naked little Sly Stallone character in the cryo chamber. There was all sorts of cool things in that movie, like a sweet red Olds 442, explosions and the like that they could've used, but nope.. we got the cryo chamber with naked Sly. I know the cryo chamber is a big part of the movie, but come on...