The PMD series' story is fantastic, there is no comparing between them in other Pokemon games--spin-off and main series. Not that the others aren't good, but PMD is clearly more emotionally involved. I think it's because, unlike the other games, you ARE the Pokemon, and they have far more human-like qualities than any of the other games. Pokemon Mystery Dungeon Sky, in particular, is my favorite spin-off game because of how the story ties in so perfectly together, especially the five special episodes. Honestly, I probably will never get over my love and joy that I feel playing through that game. From the looks of it, though, Pokemon Black 2 and White 2 may have an in-depth plotline beyond the previous games, but I doubt that they'll compare to PMD. If they make a new PMD for the fifth generation, I'm hoping that they'll add more depth to the recruited Pokemon, giving them more lines and involvement outside of direct gameplay.