The Wii is my primary console, although people should realise that doesnt have to meant 'only' console. It certainly is my main one, though. I have 11 Wii games, and 3 PS3 games.
I love the wii and wii gaming, but there's nothing wrong with complementing Mario Galaxy and Brawl with some GTA:IV or Wipeout HD. Win-win.
Wii is primary though, for instance I'm getting Sonic Unleashed, Guitar Hero:WT and Shaun White this Christmas, all for Wii.