I know exactly what you mean about Nintendo, every Nintendo console I've bought so far I've played all the Mario/Zelda stuff an then never touched the console again. So I'm probably never going to buy another Nintendo console.
@raven10: I know that I could play them solo. It's just that these games feel like they're being developed with co-op as the main or true way to play it. It sometimes feels like if you're not playing online, then you're not getting the full experience.