In preparation for the June 8th release of Prometheus I plan on watching the first three Alien films. Even if the connection between Prometheus and Alien/s/3 is tiny, I think it is good to revist this world. I just need to find time to watch after Annette goes to bed. I will be watching the following versions of the films:
Alien-Original Theatrical cut
Aliens-Directors Extended cut
Alien3-Assembly Cut (a re-do of the film that is closer to Fincher's original vision. More info here: http://en.wikipedia.org/wiki/Alien_3#Special_Edition_DVD_.26_Blu-ray)
If you have any thoughts of seeing Prometheus, I recommend you do the same.