All the DQ games on the DS are top notch stuff, IV, V, VI and IX are all great games, the graphics have been heavily improved from the snes ones, but it retained the original charm they had, my favourite one of the bunch is DQV, it has always been my fave DQ mainly because you live three whole different family generations in that one (as a child, as a young adult and lastly as a father). Oh, IX is new tho, but it's really good as well, unlike the other ones you don't really have friends that affect the story since they're all NPC's you make or just generated (not including the ones you get later on) but it's a really solid game, on which I spent over 150h.