I like games that make me feel like I'm watching a movie. Meaning there are breaks from gameplay with good cinematics. The real-time story telling first person games do doesn't sit well with me.
I don't think many FPSs have done it right just yet. For me and FPS is about immersion and my top two games for that are Breakdown(xbox) and Mirror's Edge. Those two games do a great job of making you feel like more than a hand with a gun.