1) Do you have (a) middle name(s)? (For privacy reasons, you don’t have to share what it is) -- I do now!
And if so:
2) Do you like your middle name(s)? (If they’re birth names) -- My middle name is actually my maiden name; my parents didn't give me a middle name and when I changed my name when I got married, I was hoping to keep the family name in my identity.
3) How often is it used? -- Most of my close friends met me before I was married, and because my name had very few syllables, they would address me as both my first and (maiden) last name. It has come up a few times on trips and gifts that they forget to add my married name, but it's usually not a big deal. I find it entertaining.
Training my signature to start excluding my middle name felt strange, but it was company policy where I worked...