Oh I had the Gamecube. Pikmin, Super Monkey Ball, Luigi's Mansion...plus let's talk about that Wii Fit 'craze' for a moment. It seriously changed my life.
At the time I got the Gamecube, I was unfit and pretty overweight. There was a poster here on Slashdot who in one thread or another said "How many overweight 30 year olds do you know? A lot, right? How about 40 - still a lot? Now try 50, 60, 70...". This really stuck with me, and I decided to use Wii Fit properly. Started out jogging round the living room, was then invited to real runs outside and I started do 3km, 5km with the nirvana of reaching 10km at some point.
Still taking it seriously, I carried on running. 5km? Done. The unobtainable 10km? Done. Further? Why not. I ended up running 10km a night, half marathon every weekend, and running up and down 7,000 steps a day (ground to top floor of the tower I worked in, multiple times a day). I ran a marathon, though annoyingly didn't do that well as the last 7km my knee gave out and I had to limp it. I lost about 80lbs, and at my best I was pretty fast. This is decades ago now of course and while my fitness since has ebbed and flowed, I have never returned to the state I was in when I got that Wii. The Slashdot line and the data tracking plus encouragement of Wii Fit literally changed my life.a