Many PC gamers use a mid-tower computer case, mainly because most full-featured motherboards are also full-sized ATX. Mini-ITX motherboards have come on the scene over the past few years, but many of them have been under-powered, and not exactly suitable for gaming. Intel's ION platform is changing that, and now there is a legitimate need for small Mini-ITX cases for small and cute gaming system builds.
ThermalTake's Element Q case is a small and cute case that is also targeted towards the PC gamer and computer enthusiast. Not only does it have a small footprint, but can take a decent amount of hardware, and even includes its own power supply.