Not entirely sure I agree with that. I've been gaming online for a long time, and thinking about it, sensation is a big deal. The images I use for the game, use of differing fonts and colors in chat, voice chat, music choice, all play a very large role in my games. Gonna have to go back and change my vote, I think, because I hadn't quite grok'd the notion of sensation at first, but, for me, that's probably one of the biggest draws for gaming.
I spend an embarrassingly long time on finding/making images for my game. To the point where I've had to teach myself how to use GIMP to fairly good effect.