Well, there is no true "best console", it's mainly based on what your tastes are.
I have both the 360 and Wii and I definately play my Wii more than my 360 nowadays. The PS3 just doesn't have any good titles I like that I would want to try out. The majority of them are FPSs and sports titles. The 360 has a sort of bigger library of games since it was released earlier, and with the added downloadable content, it poses as a good console, but my tastes lie in the Wii's gaming potential of its Wii remote. Sure, not many good titles for it are out at the moment, but the good ones are coming, like Mario Galaxy and Brawl, and with the addition of downloadable retro games, I believe the Wii's future looks pretty bright.