I usually go with something that sounds nice. And if happens to have a meaning, even better. That's how Xzahn was born. It's basically random letters that sounds nice (I pronounce it xan or xahn, aka without the z). It accedentally happenеd to sound a bit like the name Alexander. It has Greek origin, but its heavily used in my country, and its one of my favourite names.

Although I like it very much, I usually go with todiros. Mostly styled as ToDiR0S , which doesn't have any meaning but its derived from my family's initials, and it's also the name of my mother's LLC. I often use latin words and phrases too.