for me when I started commuting I never got any of those comments you guys have. But once I started another co worker across the cubicle started doing it too and his was a 20km one way trip. Says he loves it and feels pumped by the time he's here and saved time from the gym. Once he's home he's already done his workout and just plays with his kid. Also his commute is 1hr and his public transit commute is 1 1/2hr's fun fun and his driving is 45min! Not bad! Also my commute is only 6km and I wear my work pants and just change my bike shirt out when I get there. No real high visibility vest just a 1/2 watt red blinkys in the back so they can see me even in total daylight.