I love Mario Kart games. I've played every single one and they pretty much keep getting better and better for me. I have not personally played Kingdom Hearts, but I've seen people play it and it looks like an excellent series.
People who see life as anything more than pure entertainment are missing the point. - George Carlin
well, it's tough to decide considering we don't know what will be available at launch, but if somehow ALL those games we've seen listed so far were available, I think I'd go with Street Fighter IV and Metal Gear Solid 3. I'm assuming the remakes of OoT and Star Fox 64 will be downloadable games a la DSi Ware, so those will probably be cheaper, allowing me to get them along side 2 physical games.
Oot and Paper mario most likely. Would buy starfox 64, but since i've allreadfy pld that game to death and i play through it in about an hour it just doesnt seem worth it. I dont expect an overhaul of the magnitude to change this.