I rewatched all the Aliens through the last month.
Alien still holds up as a horror movie. But if I had to pick I’d rewatch The Thing.
Aliens is cool, but it’s long, slowish paced and you already remember all the best bits.
Alien 3 is drab.
Alien 4 is visually fun and not too dumb. If they ever put together another Alien I’d want Jeunet to direct that too.