Iwata is one of the reasons we have Smash in the first place. In addition, he was an incredible programmer, and was the reason they were able to pack a second region in Pokemon Gold/Silver, among other things. He also constantly put the idea of making fun games as Nintendo's direction above basic profits. This guy was one of my influences in my decision to become a programmer, after my family talked about him one day when I was 10 or so. Some research later showed off how good he was.
I'm just hoping whoever ultimately replaces him keeps some of that attitude.
Anyone want to help me down a bottle of Chivas Regal?