Steve Jobs may not have contributed directly to the gaming industry (and, yeh, I've heard that he actually didn't care for games), but that hasn't stopped Apple from helping to bring gaming to the masses. Even the major consoles (Wii, PS3, Xbox360) all have some of Apple's (via AIM) hardware in them by way of PowerPC processing.
I love that you mentioned 'steampunk' as your genre of distaste, because now I can sleep easy tonight! I can't remember when I was first introduced, but to this day something about it pushes me away. I want to like it, but I fail every time I try. I think it's the lack of color.