I'm working on 5 years without a car, I borrowed my dads for one year because the job was 28 miles one way and a 45 minute drive in good weather.
I've used my bike to get to work in 3 cities over the past 4 years, it doesn't rain all the time and we have raincoats.
It's not sweaty hot all the time.
There were times when I drove that the walk across the parking lot or to the garage on a hot summer day would make me just as sweaty as riding, not including the time it took to get the air conditioning to cool off or the wind to circulate through the windows in rush hour traffic.
As far as critical mass I have not seen or participated in any violence or obnoxious behavior, it's the a-holes in the S-class, Hummer, Range Rover... that are hyper aggressive and NEEDS to get to the burb's an hour and half away that gets pissed because 300 bikes making them wait an extra 5 minutes once a month
wahhh!
When riding a bike YOU make a mistake I'm hurt or dead. I make a mistake I'm hurt or dead.