I've always liked Earth Defense Force—or rather, the idea of Earth Defense Force. I love running around Japanese cities, shooting giant insects. But, who doesn't?
The idea of Earth Defense Force has always been better than the actual games, which have suffered from bad physics, wank controls, and small maps.
Good news as Earth Defense Force 4 doesn't seem to suffer for these—well, from at least what I could from my ten minute Tokyo Game Show demo.