Ok, i got it last night, and played for a few hours.
I like the game, but it has yet to "wow" me. The only things I have really been impressed with were Rapture (when you were in the sub in the beginning) and that first boss, Dr. Stein-something. Watching him operate on that chick and then completely eviscerate her was awesome.
It sucks that you have to stop moving to move your thumb to the d-pad to change bullets when you run out. I wish it would just automatically switch to the next type of bullet. Kind of annoying.
I like fighting the Big Daddies, although I have yet to find the "trick" to doing it. Every time I fight one, it usually costs all of my first aid kits.
The weapons/powers/picture taking for bonuses stuff. I hate hate hate hate hate the "hack" minigame that you have to do every single time you find a new machine. It was fun the first few times, but now I find it tedious and annoying. I can see a separate hack every time you take over a camera or turret, but having to do it for every vending machines/u-invents/etc is annoying as balls.
I've been saving the daughters. I killed the first one, but I've been saving them since. I haven't had any problems with Adam yet, though its still early.
I dunno, little annoyances aside, the game is pretty good so far. hopefully it'll get even better as I continue through it.