Wii sports is selling well because it comes free with the console and in Japan where it doesn't, its a fun diversion. You take the games success and sales for what the game is, don't act like there is some singularity by which to measure all genre of games. Is that useful? Not really, but its the best you're going to get. Despite your want to believe in an all knowing measure of whether a game was good or not, there is nothing more reliable than the game's sales. A game does well by its sales whether popular consensus is its a good game or not. Its the closest thing to an objective measure of a game's worth you'll get. I know that blows your minds but honestly relying on game reviewers isn't anymore objective.
I never claimed Game sales were the ultimate answer, just that they were the closest thing you'll ever get to an objective measure of a game. Relying on Reviewers after you or others have played the game is just a childish crutch and an excuse after the fact..
