I've been thinking about customizing gaming cases for years, and only now have I found the time and opportunity to do so. I bought a Matrexx 55 and a Matrexx 55 Mesh to try my hand at creating something, but I still can't decide on a game to use as a basis that would appeal to people and be popular enough to generate demand. What do you think? Which game would be a good one to start my customization "career" with?

p.s. there are some examples of other users' customs