What's Good about this?

I guess it's subjective tastes. I really liked the film and own it on dvd, I watched it a couple of times and found it funny in a black-humoured way but I tried to get my girlfriend to watch it the other night and she got bored with it, but- you know- it happens, you just can't like the same films (although we both do share some tastes in films- mine are mainly European or British, hers are mostly Hollywood formulaic and widely known.