Here are the advantages:

I can control speed with my legs.
I can track stand for years.
I can snear at singlespeeders.
I don't need a brake (allthough my bike has one).
I can ride backwards.
I can skid and skip.
I learned how to pace myself. E.g. steady pedalling vs. spring, coast, sprint, coast, sprint, coast.
My bike is very quiet.
I can babble about that Zen experience that comes with riding fixed - like everyone else.
I can make funny and not so funny jokes about being fixed.
And on and on and on ad nauseam - you see there are many advantages.