As someone who splits his home gaming between a Wii and a PC, I will say that, whatever the shortcomings of how Nintendo has handled certain features of the console, I cannot fault the game collection I've built up for the Wii over the preceding 4 years. It hasn't been perfect, but it's been ever so much fun, and I'm primarily talking from a solitary perspective, as there are few people near me willing to sit down for multiplayer games. When a system is marketed majorly as a family or party play system, yet I consistently enjoy playing Wii software alone, that says it all. To this day, Nintendo still champions the franchises and the types of experiences that I like, and no matter what technical superiorities the rival systems hold, they don't have that fundamental appeal for me personally, and maybe never will.
If we're in the mood for grades, I'll thrown down a solid B. It's been very fun... like I said, not perfect, but in the area where the Wii loses marks (as the four of you discussed, the online infrastructure), I can simply scratch that itch on my PC.