I think that Aliens was the best movie of the franchise, but I liked what the first one did more for the sense of tension and horror which became increasingly less in the following movies. The better parts of the movies often being when it used what the first did more. It is kind of like how the game, Alien Isolation, had what it was so well, and you can kind of find a problem that started in Aliens in the game Alien Marines.
I am still an AvP fan though, I don't really consider myself any sort of purist, that I can just enjoy seeing them go at each other. I also enjoy Prometheus against all the hate it gets, that people complain about stupid things with it that they don't understand. I plan to some time soon of writing this to watch Covenant.
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Through dream I travel, at lantern's call
To consume the flames of a kingdom's fall