Star Trek: First Contact
I'm really not a Star Trek guy, but I do really enjoy a few of the movies, this being one of them. The effects are really good - the Borg look far, far better than they ever did in the TV series - there's some nice action and even horror elements, and the cast all vibe well together. If I criticised anything, it's that it feels like it could do with some additional build-up before the battle at the start, to generate some more suspense. As it is it kinda feels like the Borg just suddenly arrive at Earth without any resistance.