Funny, I've got a fixed, and I ride it sometimes. Yes, it's nice to have a very direct and efficient transmission, and it's the lightest bike I have. But I don't really get the zen thing.
When I ride a geared bike, I hardly ever freewheel. Is that why fixed doesn't give me that zen cloud thing?
When I ride with others, I can find it quite annoying that they keep stopping pedalling, so that they slow down a bit, and then start again, and speed up again, all for no reason.
It's those part-time pedallers that should be riding fixed, not me.
If you're a part-time pedaller, stick with fixed and you'll learn not to be!