It still surprises me how dissapointed some people have been with this game... I agree it's not quite as good as the first one, but I think if you don't spend the whole experience expecting it to be then it's still a pretty solid game for the most part...
If it was just called "Booker De Witts Stratospheric Adventure!" (or more likely some pretentious name picked from the cliche hat - "Cumulus") totally not related to Bioshock, would you consider it an okay game? I've certainly played much worse than this
Brilliant game but it's not for everyone. Besides I've never played (or even read about) any game that somebody didn't like.
Even the first few minutes of the two opening scenes blew me away, I spent a good while wandering around the opening part of Columbus, just admiring the sights and sounds, it was dripping with quality. Of course many people will have sprinted through them looking for something to shoot at. There's so much more to the game than that.
The beach scene apparently took ages to make - watch the developer's commentary on it, they said something like it makes them cry to know some players will just sprint past it to the next thing you can shoot.