lol, I'm a secondary teacher so thought very long and hard about names.
I wanted something outside the top 100 - seen too many children with very popular names given unfortunate, descriptive nicknames (thick Ben was one I remember!)
It also had to be shortenable or with lots of nick name choices. I hate my given name, so I use a nickname. I have taught lots of kids who dislike their names. Was a good decision in the end as my eldest strongly dislikes her name, and so uses one of the many nick names that her name can be shortened to. I would still have this as my number one rule. Interestingly, my daughter also says this would be her number one rule too, for the same reason.
Can have cute nicknames, but also a more serious / adult version of the name too. Eg I would use Matilda shortened to Tilly, rather than just Tilly.
I also like feminine names for girls (but not too frilly / flowery) and strong names for boys.
My children are both teens now. I would still stick to these rules, but my tastes have grown more traditional. If I was renaming my children, I would still use my younger daughter's name, but would have chosen something more classic for my eldest (Charlotte, Elizabeth, Harriet or Helena I would use now)