I realize that the above explanation is quite lengthy, but that is necessary to really explain the magnificence that is Bioshock. It’s a beautiful and haunting adventure in a world that has been more painted and fleshed out than any I’ve ever seen in a videogame. For that reason alone, it’s worth a playthrough. I almost feel that the first-person aspect plays second fiddle to the adventure itself; it's like they simply needed a way for the player to experience Rapture and the FPS view was the most effective method.
As for the actual combat – while it’s not the best I’ve ever experienced, certainly not on par with games like Crysis – there are no glaring problems with it and it serves its purpose. The guns all feel powerful and using the various plasmids – like fire, ice, and lighting – is an absolute blast.
Fighting Splicers is one thing, but fighting a Big Daddy is something that has to be experienced. When I came across a Little Sister and her protector for the first time, it was something that I had been heavily anticipating. It was amazing to see – this little girl walking around, talking to her protector and using a syringe to extract ADAM from dead bodies. The Big Daddy was stomping behind her, occasionally surveying the surroundings. It’s his (or her, no way to tell) job to defend, not attack. So as long as you keep your distance, you’ll be fine. You want the ADAM that the Little Sister has however, so you have to make a choice. If you do decide to attack, know that you’ll be fighting for your life and you’ll have to throw everything you’ve got at the Big Daddy if you hope to come out alive.