I started playing the first on my old computer, but it didn't work that well, so I sold it to my friend and played the beginning on his computer but never finished it. then I played BS2 and completed it and then got a new comp and decided to playt eh first again, so I went out and bought it and played it and loved it.
I just completed BS3 last night and I'd have to say, that was one killer ending. the game didn't rely on the action sequences (although, when i replay the ending, I still die all the time, fun though) and the ending is something I'd gladly watch over and over again. the camera movements are brilliant, like in a really good movie and they utilised the 3d engine perfectly.
Brilliant game, i'd suggest everyone play it.