I would have to say Wii Sports, because I play that almost every day, where with Zelda, or Red Steel, there are a few days in between play sessions...
My Wii Games: Wii Sports, Wii Play, LoZTP, Red Steel, Rayman Raving Rabbids.
Wanted Games: Super Paper Mario, Excite Truck, Need for Speed Carbon, Medal of Honor Vanguard, Spiderman 3, Pirates 3
Friend Codes for DS!
Mario Kart: 193368313009
Diddy Kong Racing 090290007271