control in hairball traffic. "zen" or whatever. connectedness...i dunno, i like fixed for that reason.
plus, you're out in all weather...no loss of brake power in rain and snow. i rode with a girl in portland who had a track bike, but never dragged it out for work. i thought she was silly. especially when it would get hairy during the rainy season and she would experience no brakes on a freewheel due to her rims being wet.