Muramasa: The Demon Blade
Muramasa appealed to me in a way that Odin Sphere didn't, thanks to an emphasis on combo-heavy sword action instead of planting and whatever. And the RPG elements that are left, like the sword upgrades and cooking, are not only fun, but simple enough that I can get right back into the game after a long break and still know what is going on.
Also, I don't mean to be shallow, but the fact that Muramasa is the most beautiful game of 2009 helps me be positive about it.