I think the comic that's gotten me the most feedback is actually the one about the stoplights. Noticing when the stoplights are in sync, or calculating the length of your strides between floor tiles - normal people notice that kind of stuff, but a certain kind of person will do some calculations.
Randall MunroeYou don't become great by trying to be great. You become great by wanting to do something, and then doing it so hard that you become great in the process.
Randall MunroeThe thing about the Internet is that you can write something... for a very narrow audience and make a living at it.
Randall Munroe