I really only enjoyed Alien, Aliens Predator, Predator2, AVP Reqiuem.
The newborn ruined resurrection, i didn't like alien 3 for some reason. Avp I just didn't enjoy at all.
I liked the pred movies more but the alien franchise is good aswell, also I liked both avp films despite some flaws(avp=no gore,pg13,barley any avp fights, avpr=dark,poor acting).