All it really takes to have a good time with your DS is a game or two, but we tend to add in a few accessories for comfort's sake ... and maybe for a bit of personalization as well. What do you go in for? Case, special headphones, or perhaps a different stylus? We want to hear about your choices. What accessories do you consider absolutely necessary? Screen protectors -- that's our pick, and yet we're surprised by how many people venture out with a bare screen.