Yeah the quadrilogy rocks. I think that Alien 3 had very good special effects, but I can see your point. I'm pretty sure it's because the director tried to return it to the simplicity of the first one. I also think that he made the right move; it was such a gothic horror masterpiece.
~For centuries, human beings have worshipped these beasts as gods, beasts that will forever haunt us, beasts waging an eternal war.....~