Respect for the first-time-fix-in-traffic approach.
I'm into the idea of simplicity; love the look of a bike without too many brakes or gears; and would like to be able to cycle backwards and play polo like an old-school hero: so I have been toying with the idea of a fixie that can do modest off roading.
But I just can't get round what I see as the drawbacks of fixed. In no particular order:
when you slow down, your knees have to take a strain that they weren't designed for
if the chain comes off you're funked
if your feet slip off the pedals some part of you is going to get slapped
if you go down a steep hill you have to take your feet off the pedals like a 1940's delivery boy, brake heavilly, or bounce up and down like a pranged prairie dog. ( i know that fixers develop excellent spin, but some hills are too steep for that)
As to the whole fashionable fixie thing,
A: it's not that fashionable anymore, and
B: some of the off the peg offerings are stupidly priced, but at least you can now get hold of a range of v. useful odds and ends which add extra scope to titting around with bikes which we've always done.
I reckon a home-madepub bike with flip flop fixed/free is worth a go, and, as I've finished another glass of prosecco while writing this, I think I need to build one. Damn.