I've seen this a handful of times, although I can't remember the last time I've seen it. First of all, I think it's an awesome blend of the horror and sci-fi genres. It's completely understandable as to why the Xenomorph just won't stop popping up into different incarnations. To some degree, I feel like this one is almost disappointing at times because it's ONLY one Alien. That's not a complaint as much as a testament to how great of a creature is really introduced in this movie. It is also just such an excellent combination of different factors, the isolation of space and the confines of the ship, we have a creepy ass Ian Holm talking up the perfection of the alien (even the Face Hugger can't be beat!), and the infighting of the crew. I suppose it just takes the best of both genres. I guess some people would consider it pretty slow... like any good "classy" horror or sci fi flick. I have to admit getting a bit of a boner at how long they take before they actually reveal the Alien. Scott's direction helps tons. Every time I see this movie, it looks better and better. Occasionally because it's remastered, but I'm amazed at the special effects that went into the picture. Also, the cast is just a friggin' classic 70's cast. JOHN HURT ISN'T EVEN FILTHY! Until his chest burst opens... then he gets all gross again.
Awww! Man! I'm exhausted!