It looked good, the story was good and the atmosphere was good but to me the downhill started from the fact that there wasn't any actual RPG elements left in the game. I thought it shared similarity with system shock 2. That you had to pick carefully what cybernetic implants plasmids/tonics to take with limited Cybernetic modules adam. In system shock there was many diffrent play styles forced on you by the RPG elements in the game. You couldn't be a jack of all trades. In Bioshock everything is handed to you on a silver platter. No limitations. Your choices do not actually influence the gameplay because in the end, you will have every plasmid/tonic/weapon, and even adam to throw around. Then it becomes your average FPS. Then another thing. The Rapture is a very small place, and enemies respawn like there's no tomorrow. You can't take a step left without getting into a fight. Also. There's no penalty whatsoever if you happen to die. So feel free to give that big daddy a pat in the bubble with your wrench. The vita chambers are everywhere, and it's totally free. And my main gripe with plasmids was, that it did not matter what plasmid you had in use, because you could use any trick, anywhere to kill enemies. Water pools, oil spills, heavy objects, exploding objects. Everywhere. "Whoops, 10 splicers are coming at me, and I have this fiery finger equipped. There's a pool of water. I wish i had the electric shock so I could kill them easily. Hey but wait, there's a puddle of oil right next to the pool of water."
In the end I did enjoy the game, but because of the handicapped RPG elements, I don't feel replaying it anytime soon.