Do you write the number 1 as a simple vertical stroke, with a short or long hook at the top, or perhaps even with a serif (horizontal foot) at the bottom? Do you write 7, q, and z with a horizontal stroke through the middle (7 and z) or the foot (q)?
I personally write 1 usually as a simple vertical stroke, but sometimes with a hook and a foot if it needs to be obviously a number. I also write 7, q and z with a horizontal stroke, even though I was not taught to do so when I went to school (between 2004-2016, the official handwriting style taught in Finnish elementary schools prescribed 7, q and z without a horizontal stroke).