My mom just asks me if I need more warm clothes for the winter months, my dad just wants me to be careful, and my sister drives a Suburban. I'd say that I'm pretty stereotypical in the atomic family value system.
My family is mostly in Mississippi. The fattest state in the union. Gas there is now below three bucks a gallon. Most of them think I'm weird anyway. The bike thing is just more proof. They wonder how I can live in a place that has so few "all can eat joints".
Everyone in my family is fine with it except my Grandma. She thinks I only ride around the park, it works out well as I get nagged less. She knows about Critical Mass too, and is always afraid I will get arrested or run over. She made me promise to never cork...hehe my Gram knows about corking!
mom likes that her baby boy prefers bikes to cars and thinks critical mass is the coolest thing in the world.
dad and sister just want me to be safe - they are both slaves to cars.
brother-in-law just wants me to be safe too - he's a slave to my sister.
they're all in taiwan where many many many bikes are made.
My dad didn't give me much grief about riding because he also rode for most of his life (although the majority of his riding was in Evanston). That changed a bit after he had to pick me up from the ER after a nasty crash several years ago (thanks to a suburban pothole in early morning shadows). He expressed concern, especially about commuting into the Loop, but never nagged. I always appreciated that.
My parents are really supportive, and in fact I've inspired them to dust off their old bikes (well, my mom's was past saving so she bought a new one) and ride around. Now they go on leisure rides on the weekends and my mom even got panniers and rides to the grocery store!
My parents are very supportive, but then again, they're flat-out hippies.
My brother came to visit and I lent him my spare bike for a week, and he had a blast. My sister (who lives in Suburbia and drives all the time) is skeptical, but generally considers me the nutty one in the family.