Ghen - I agree with you about the SS2 thing, although I think that
the twist was handled much better in SS2 than Bioshock - there were
too many hints about it in Bioshock for my taste. Still an awesome
game though.

Schad - There are storyline missions out there, unfortunately you
have to do some digging for them. If you're playing one of the new
races, their starter areas have been better designed, and the
missions there tend to have a better plot linking them together -
that might be worth a look if you haven't tried them yet.