Both of you are being a bit ridiculous here -- the other poster is pretending his opinion on Fallout 3 is objective fact, and you've got a very limited definition of depth.

A game doesn't have to offer narrative choice, or customization, to somehow be "deep". A story on rails can be an amazing game if the way you interact with it deepens your engagement with the story. (I'd say that's very much the case with ChronoTrigger.)