I have absolutely no interest in this game at all.
Zero.
What stood out for me in the first was the world, the visuals, the art, and the music.
If I want to experience that again I'll play the first... and while I really enjoyed it quite a bit, I am frankly done with that world.
The action was above average, though at times didn't feel as natural a shooter as it should have.
While there was plenty to look forward to before the release of the first Bioshock, I haven't seen anything new that would make me buy the second.
I can't say that won't change, but my feelings on this are similar to that of F.E.A.R. 2...