Interesting question.....I guess I would have to say(of those i've played) that KQ6(with it's amazing soundtrack and locations and characters) is my favorite, as well as the (often disliked, sadly) KQ8......which has it's downsides(like slow walking speed, meh control scheme, some empty locations), but I still like for other reasons(music/intro/change from prior entries to trying something new, etc).