I haven't visited this forum in a while, and this question probably has already been asked numerous times, but do you ride a single speed to work/school, or multispeed?

I ride a multispeed, but I only use 2 gears out of the 15 that I have, so I might as well switch to a single speed. Right now, I'm just reading up on some things by Sheldon to get familiar with the single speed, and how I would go about making that conversion. But while I'm at it, I'm just curious how many people prefer single speed and how many people prefer multispeed.