Alien is my #1 jam of all time! I consider it the perfect horror/sci fi movie. I actually saw Aliens first, and it was very disturbing as a scaredy cat little kid (dont get me started on ET as a 4 or 5 year old). I love both the 'prequels'.
Prometheus is probably the most excited for a movie aside from the LOTR trilogy back in the day. Despite the hate it gets by the snooty movie experts, I loved it. Plot holes aside, dont really care. The self cesarean section scene is an all time gross out scene in any movie for me. Yeah, covenant was a little wacky in parts, but still loved it too.