Prince of Darkness (1987)
It's been years since I revisited this. Not my favorite John Carpenter movie but some of the casting is pretty good especially Donald Pleasence and a surprisingly good performance from Alice Cooper. While I find the characters uninteresting the film is able to deliver on the creepy factor. There are some disgusting uses of live insects, a really cool special effect on the canister and a couple solid kills. I think the idea that Satan was an alien is kind of interesting as well.