I still get nervous too. But I've only been flying for a year. I think after the "newness" of a plane wears off it really helps. Regardless of what some people say every one crashes at some point. Nobody wants to wipe out a plane before they have had a chance to enjoy it.

Once that nice new planes gets a war wound or two your neverousness gets less. Its like getting that first couple of scratched on a new car. You baby that new car to death for the first 6 months or so. Then you relax and realize its just a car.