Having reflected (hey, look, it's exactly an hour later!) and read some thoughts of other people, I've decided I like it. Or think it was "good", or whatever. That was my initial reaction, but there was one aspect that left me unsatisfied that made me have to think about it more:
Also, reading about it has convinced me to try Bioshock again. For the third time. Somehow I've managed to make it 5 1/2 years without really spoiling that game, though I have no idea how.