I've been commuting and working at the same job long enough that I'm just "that guy". I do get the strange question from people of "are you still riding your bike?"...sometimes while walking towards the bike lockers in bicycle clothing

If it comes up again, you should tell the person that you are rich because you bicycle commute everywhere. Pick a gas mileage and calculate how much money you save. I, for example, just filled up the tank on my truck yesterday for the first time since 10/31. That's 30 days of commuting to work at 20 miles per day in a vehicle that gets 12 mpg. At $3 per gallon, that's $165 I didn't spend on gas. Another way to put it is that I used about 3 gallons of gas per week instead of 9 gallons per week over that 6 week period. On a per year basis, that 156 gallons vs 468 gallons or $470 vs $1400 at $3/gallon.

Plus you can be smug about green house gases