If you've played a Wii with friends, you know it's a lot more fun to do actual motions than just sit there on your ass doing little wrist-flicks. If I'm playing a golf game where I have to mimic the motions of a swing, then I damned better well be able to use my actual golf swing and not have to act like I'm chipping the ball for my drive.
Also, the best stories have to be not of the remote slipping out of peoples' hands (which is just stupid on their part), but the ones that involve injury of actual people. One of my friends camped out for a Wii and got it at a Walmart on launch night and brought it back to a party I was at. By that point most of us were pretty drunk, and while I was playing Wii Tennis with a friend, one of the other girls walked too close and got punched in the face by the girl I was playing with when she tried to do a hard forehand.
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