Simply put: classic.
You can’t get better than spending a weekend on an ALIEN marathon, with the original kicking things off. This movie set the very standard for alien lovers the world over, and, though I wouldn’t say it is my all-time favorite (Predators  takes that honor), it is definitely a movie I could watch over and over again.
For it’s time, the special effects are amazing. Ripley, of course, is hotter than a firecracker when she runs around killing all those nasty lizard creatures from some distant galaxy. You just can’t go wrong.
I own ALIEN and so should you.