I dunno what sets me apart from nearly everyone else on these boards, but I had a damned fun time at that film.
It was a very fast-paced movie, sometimes good and sometimes bad. There were no spots that dragged for me or made me want to push the fast-foward button (unlike Spider-Man 2, which I hated most of), and in fact there were several spots that I wanted to see again becaues it was so cool. I hardly noticed just how much time passed between sitting down and the end credits rolling (which is more than I can say for any of the LOTR films, which make you painfully aware of just how long you're sitting there for).
Now I'll agree that it's no work of masterful filmmaking, but nor is it the smoldering pile of garbage that it's been labled as. There are homages to each of the franchises that gave birth to it, if only by a spoken line or a specific camera angle. Little caveats for the fans who've been following the franchise in the comics and novels and even the games, and other little touches like that are what make it a fans movie in addition to a good summer popcorn flick.
Is it a better movie than Spider-Man 2 or LOTR? Not by far. Is it enjoyable? Damn straight it is. Will I see it again? As soon as I can.
I'll be kind and wait for some time before covering some spoilery issues that have been raised in this thread, but that really shouldn't take long given how packed the theater was tonight. I talked with the teller lady and she said that nearly every show had sold out.
Gives hope to a sequel with Colonial Marines