Over the years, I've picked up a few of the Simple 2000 games as I've had the chance. Last night, I got Zombie vs Ambulance and after playing it a bit, decided I need to get some more from this series. I currently have the ZvA, Daibajin, and one of the pinball/breakout clones.
What other games should I pick up? It looks like there are several version of Earth Defense Force and Onechanbara, both of which I have and enjoyed on the 360. I also noticed a couple of shmups, which are always fun for at least a little while.
I should note that I have no japanese language ability, but I can usually stumble my way through the games that are light on text/menus.