Hi BadManiac, Ghostman,
Thanks for the comments,firstly I have to clarify that I am a distinctly subpar gamer. I always find WASD awkward to use, and though I admit aiming with a mouse is much more accurate I find movement easier with a Xbox controller. You're probably right, or far better at PC games than me. Part of why I am pants at FPS online games.
I did say that I never completed System Shock, I have it here glowering at me - cursing my ignorance a d challenging me to complete it in order to back up my claim. BadMan you may be right, and if I complete bioshock system shock 2 is there based on your recommendation, I'll let you know my opinion - though I am not saying its right.
The sixth sense analogy is pretty spot on really, I guess if you know the twist, it takes the fun out. I haven't read the Rand books, but I know you are right that Bioshock was based on this author, I guess it did ask pretty interesting questions.
As for depth, Bioshock is 18 fathoms beneath the ocean, system shock is in outer space. 18 fathoms is far deeper ;-)
Cheers for your thoughts and contributions.