Since I rebuilt my old Fuji road bike, I haven't ridden fixed
except at the track. Some train with a fixed cog, and riding
fixed could potentially help you in wet weather conditions,
but those are basically the only reasons I can see for riding
without a freewheel on the road. Being on a fixed-gear bike
year-round is like driving with snow tires on all summer long.

As for the "Zen" bull, most of that comes from bandwagon
jumpers who got their first non-Huffy bike back in August
and now think they're Theo Bos or something.