While we're reviving this topic;
System Shock 2 was better in every way except art design (SS2 was for the most part fairly generic in that sense), but then again very few games touch SS2 as far as I'm concerned, so that's not to say Bioshock isn't good. The last level and the ending both disappointed me greatly though (had so much potential...).
I will say this: the game didn't really get interesting until around I guess the 30-40% mark, because in the beginning you honestly don't even know WHY you're running around doing all this crap, you just sort of do it because there's nothing else to do... but definitely pick up and listen to all the audio journals, it makes things much more interesting.
Let's face it, it's better than 99% of the other crap this industry has churned out lately