I picked up a sharp, angular, blocky M for my first name from my dad. I'm not sure why, but I saw him write my name on a form or something when I was younger and he did it that way, so I followed suit. The rest of my first name is pretty scribbly. My last name is the same. A large, sharp, angular K and scribbles. All of this is then off set by a big swoopy L I place in the middle for my middle initial. Fun thing, is I have two middle names because my mom was weird, and I've essentially dropped the second initial. For one, I just don't like the aesthetics of the two initials, and I've run into quite a few online forms or E sign programs that only allow a single character for the middle initial slot. Even if you're able to add more, there's a weird conundrum of do I just put both characters? Space or no space? Comma? It's easier to just pretend the second one doesn't exist, and I've gone my entire adult life doing that with minimal issues.
Another fun signature thing.. I worked in a bank when I was younger, and had the opportunity to go tour one of our regional offices where we processed checks and things of that nature. Learning about the behind the scenes of modern banking, and fraud and not what I learned that naturally, there's not like someone in an office somewhere who cross references every check signature to a signature card for validation. The only time it really ever comes up, is in the event of actual fraud occurring, and then it's investigated.
Ever since then, when I sign a digital POS system for a card payment, I just draw a smiley face. My reasoning being, that if I ever have to dispute a fraudulent charge, it would be very easy to look at my history and find the misplaced signature.