It’s my favourite Alien movie, I love the director. But I think it’s my favourite mostly because I watched it a bunch of times when I was a kid.
I didn’t see it until a few years ago, but I loved it when I did. True story: Alien 3 was directed by a New Zealander, Vincent Ward (who also directed the sublime The Navigator.) He was my neighbour at my last flat for about a year, although I didn’t realise who he was until after my flatmate mentioned it, by which time he was just getting ready to move again.