I'm not sure how being "too young" can be a valid excuse unless you are under 15 years old.
EDIT: actually, I don't think it was the Director's Cut, since it had the extra "violent scenes" (and which are important IMHO). But it couldn't be the International Version since it didn't have the voice-over, nor the Final Cut since it was before 2007. I'm stumped.
Alien is nearly 35 years old.
There have been a bunch of movies made since then that OP may have thought he needed to watch - thus not having time to watch the actually good movies.
I'm about to watch both of these in the next month, so it'll be interesting to see the clunky bits. Visions of the future from the past are fascinating. (See also the Gibson story "The Gernsback Continuum".)