I think the real reason I enjoy riding fixed is all the cool comments and attention I receive when I pose at local coffee spots. I never park my bike with the drivetrain facing a wall or storefront. Display your bike.
Sure, I ride my fixed bikes more than a just a few measely miles. I've ridden centuries and double centuries on them too....but why on a fixed?.....I could have done these long distance rides so much easier on my geared bike. Again, it's all the attention.....and they're worth it. Perhaps I didn't get enough attention as a child? I really don't know.
Oh, like others will tell also you, chicks dig fixed gear.