You guys never brought up the reason I was excited about this movie before it came out, which I guess was my own misinterpretation of the pre-production rumor mill, a medium I've since learned to ignore (mostly).
From stories I read at the time, Ridley Scott announced to the Hollywood money people, "I want to make a prequel to Alien. It isn't even going to have humans in it. Still, the name alone will mean box office gold. Give me all of the money." I was disappointed, because the fact that stuff like the space jockey are never explained is one of the things that makes the first film so fascinating. Then Ridley started actually making the movie and announced to the press, "Psych! It's not a prequel at all. It just explores some of the same ideas and also happens in space." I thought he actually had an original idea and got the thing green lit by playing off his past success, using the studio sequel obsession against itself and tricking them into funding original IP. The director of Alien and Blade Runner was about to show us a new vision of the future.
When the movie came out and reviews started to surface, I realized I had to ignore the whole thing. I might have enjoyed it more if I had seen it on a larger screen than my TV, but I think Avengers was out at the time, and I stand by my choice to see that one more times in the theater.
When I finally saw this movie, my expectations were lowered enough that I hoped to at least find something to like. At some point after the first act, I shrugged and asked the screen, "So?" But I never did figure out what the characters cared about or why I should care about any of them.
Good commentary though.