Wii Play. It's dead on awesome, and has an absolutely huge value for the money, considering the low price.
Fire Emblem: Radiant Dawn - self-explatorinary.
Toki Tori - Awesome platformer-puzzle, and definately among the top of Wiiware. Perhaps just slightly underrated.
The Godfather: Blackhand Edition - Has spot on Wii controls, and a lot going on in the town. I've played it for over 100 hours, and taken over every single enemy owned place. Graphics aren't top notch, but everything else is marvellous.
Big Brain Academy: Wii degree - it's a game you get addicted too, and that's great! It definately improves your ability to think fast in certain cases, and with a friend it's fun as heck.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS
