It's interesting to learn today that Iwata was pretty much wholly responsible for enabling one of the defining features of my favourite games of all time, Pokémon GSC (the defining feature being the inclusion of Kanto of course). It's good to be reminded of how good this guy was on the ground as well as as president.
DS/Wii/3DS/WiiU are all consoles that mean a lot to me and Iwata was president for the release of all. You will find him in the credits of undoubtedly the majority of my favourite games. I have a lot to thank Mr. Iwata for.