Your favorite soundtrack from the Alien franchise so far?

[Corporal Hicks]

For me it's all about Alien 3! Though I also find myself listening to the Alien Trilogy (game) and Alien: Covenant soundtracks fairly frequently too.

[The Cruentus]

I like the Queen theme from Alien trilogy. Suits the boss battle very well.

[Local Trouble]

The first three movies all had superb soundtracks, IMO.  IIRC, Horner had very little time to compose for Aliens so maybe that's why it was such a blatant rip-off of his previous work and 2001.  It was practically a temp track, yet it worked perfectly for the movie.

[Xenomorph60]

Alien 3 is horrible but the soundtrack is amazing.