My first reaction is wiiu.... but that system had such an amazing array of 1st party titles. I did love it in the end. But then, I think.... what about handhelds, too? Then that leads me to the vita. It sold as bad as the wiiu did, maybe worse, since sony stopped releasing sales figures for almost from day 1, then i think... yeah. The vita. With those overpriced memory cards, almost zero 1st party games, not a single legitimate big game that just sold like crazy despite the minimal userbase. For me, the vita. The vita is the worst follow up system of all time.