If I may; When Alien was released, I became an instant fan. A huge nerd, in fact. I went to see it weekly, as I had Star Wars a couple of years earlier. I bought a book that told the story in screencaps, wore out the soundtrack (one of only two pieces of vinyl I still have). I still listen regularly to the CD conversion of that very album, pops and all. I also keep a full audio rip of the film in my car and on my iPod for long trips and commutes. I would estimate that I listen to that audio rip 5 or 6 times a year. Like I said, lifetime Alien nerd.
When the sequel was announced several years later, I was uninterested. Alien was a complete story and I had no desire to see it being expanded into a franchise. To this day, I've not seen any of the sequels, nor will I ever.
Fast forward to now. I've been keeping up with Prometheus peripherally. The more I see, the more I know I'll be there opening week. I love the idea of having completely unrelated stories taking place in the same location, separated by many years. I may not dig it, but at this point I'm looking forward to it. Scott has made two of my all-time favorites (Alien and Blade Runner), and a couple of others that I enjoy. I feel like the story is in good hands.
Plus - after 33 years - it will be interesting to see this guy...

again...

Side note; I've been meaning to start a thread about an aspect of long-time favorite films. Alien figures prominently in my topic of discussion. I'll get to work on it this weekend.