Yeah, that's true. There's a reason that I didn't buy any Mario Parties after the first one. It's not necessarily that I wouldn't enjoy the other games, but they simply failed to entice me as much as the first, novel, instance of the concept. Although it should be interesting to note that the first iteration of a franchise on a new platform probably gets a burst of "newness" because of the platform's inherent newness, hence Mario Party 8's great sales despite hardcore gamer grumblings.