Another thing Valve hates. S****y motion controlled party games.

[Words Of Wisdom]

"We have these technologies now that let us interact in different, really exciting ways. It's developers' jobs to do something with it. Impress me. Don't just make sh*tty games I wouldn't want to play if I had to use a joystick."

I agree with this. 

Focus on making the game fun as your top priority.  It doesn't matter how novel the controls are if the game isn't fun to play in the first place.