Bad:
1. I thought it was supposed to be scary? On the other hand, it was sad.
2. Setting it before Alien, or setting it up for a sequel is cool, deliberately toning the xenomorph down was not. They killed the two creatures pretty quickly. Understandable with the weaponry they got, but nothing like Ripley's final face-offs in either Alien and Aliens, both of which were partially emulated here (or got nods to, at least). From the moment they saw the strange truck-like thing in the terraforming bay, you should have known there was little reason for it to be in the film other than smack the xenomorph's ass like Ripley's exoskeleton. I'm a little bit slow, so I got the hint when Daniels said ‘my territory’. It was actually good, however, I was mentally still at a point where I thought we were barely getting started, and the film ended.
Kicking it off with two neomorph was underwhelming as well. (It's not like the face hugger → chest buster → xenomorph thing was that brilliant on its own, it was the actual storyline that made it so, so there's little point to be building up to it slowly. Well, I guess there is now – to show what a maniac David is.)
3. Prometheus is still canon

4. I think I'm starting to hate theatres. I just noticed there were other people in them.
Good:
1. David's memory of descending upon the poor doomed world was extraordinary. This once undeveloped (?) but thriving civilisation that got ended so suddenly like this is fascinating, harrowing, and brilliant in a way. Entering the ruins of the city was just as horrifying, I was on the edge of my seat when I saw the first body wrapped around the bars of entry (exit!) way, but I was never prepared to see that field of death. There wasn't a better spot for this to take place, everything from the graveyard, to the hint of history, to David's lair. Absolutely stunning setting, 12/10. (And the second lander even failed to acknowledge it when they landed in the middle of it...)
2. Before ever seeing Alien, I thought it would attack me in the bathroom for some reason, tying around me while I'm lying in the bathtub. I guess got my anti-wish, in a way.
3. For some reason, this month somehow I got this idea of a xenomorph “side-kick”. As if I would keep one as a pet... I apologise, partner (intelligent creatures can't be pets). So David's affection for them frighteningly reminded me of it. I now have to bleach my brain for ever imagining that, as I feel like I'm like David

4. David was a fantastic character. He fooled me
after I suspected him from his very first scene. Both times. At no point I was certain of where he stood, constantly going back and forth. Even when I saw him kill everyone in that city, I wasn't quite sure did he do it, was he saddened by it, happy or all three.
4. Peter Weyland is one big asshole. No wonder he would create that kind of android.
On the fence:
1. So... How did the Engineer ship end up on LV-426 with David's creation on it?