Over my 26-ish years on this planet, I’ve come to notice that there are a few (insignificant) things that I do differently than the majority of people I’ve met/seen. Here are some that I can think of off the top of my head.

• If you’re counting off items/tasks/whatever using your fingers, do you start counting using your thumb or your index finger? I start with the index finger, while I’ve seen the vast majority of people start with the thumb.
• You’re in the bathroom washing your hands. Do you put soap on and then water, or do you do water-soap-water? I do water-soap-water, but every time I see someone else wash their hands, they just do soap-water.
• How do you pronounce the “e” sound in “egg”? Does it sound like the “a” in “made” or more like the “e” in “bed”? I remember Sean and Aaron always pronounced it like the “bed” sound, but I pronounce it like the “made” sound. I’ve noticed that most people (those I’ve met and those on TV and such) use the “bed” sound. Similar words with similar issue: leg, peg, Meg, Greg, etc.
• Similar with “catch.” When I say it, “catch” rhymes with “etch”, but when I’ve heard most other people say it, it rhymes more with “batch”.

There’s probably a much greater proportion of people who do these things the way I do them, but I certainly never see those people, haha.