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These days I work as a Nurse's Assistant and Unit Clerk, 12 hour night shifts in pediatrics, at a large (for the region) area hospital. I've been doing this kind of thing for over 20 years now, doing everything from home healthcare, to orthopedics at the trauma center, from integrating autistic kids into the community, to working in ICU's and an ER and just about everything in between. I also worked as a bicycle courier (specializing in heavy cargo) and legal messenger for a couple of years and played a lot of bike polo and did a fair amount of tall bike jousting at that time.
As far as the stereotypes go; high school diploma, a few years of college, no degree, and yeah, I can't afford a car on what I make given what rents are around here. A good friend has two cars, and I can borrow one of them most weeks of the year, but even when I have it borrowed for 6 weeks or a couple of months at a time I ride almost every day. So I think even if I owned a car again I'd be riding almost every day. I prefer to ride and don't like dealing with parking or paying for gas. But really, it's about preferring to ride. I feel better both mentally and physically when I ride, and I enjoying riding. I'd prefer to ride, even on rainy days and with jerky car drivers around me, than drive a car myself.