that video games offer a totally new way to tell a story, and developers have yet to fully take advantage of that. It's sad, really. I don't think that a game needs a good story to be a good game; unlike movies, games actually have interaction which makes them fun to play. However, you are right, there is no reason not to include a good story, especially when working with a medium that can make a person feel more emotion than a movie or book ever could.

"The creatures were friendly and could see in four dimensions. They pitied the Earthlings for being able to see only three." -Slaughterhouse-5