Started riding fixed gear at 40, 45 now. Actually, had a tricycle at age 2, then a Big Wheel at age 3 that were also fixed but that's a different category. I've built up and sold a few SS/FG and plan to build another one or two in the near future. Mostly a roadie but even then, I've taken the San Jose out on some shorter group rides and there's an older guy that regularly takes his fixed gear Soma out with the roadies with no troubles at all.
I ride with front and rear brakes and standard drop bars. SPD pedals. ~75 gear inches, depending upon the ride. Lycra and helmet.