I had braces when I was younger. I never really had a thing for braces but definitely did for appliances, both fixed and removable. Braces embarrassed me a bit because they were always there, but I was always super jealous of my friends who got expanders or other appliances. I wonder if it's a grass greener thing, I'm sure if I actually had them I would not have liked it, but the idea of it still arouses me! Nowadays, I would love very invasive treatments, just as a few of you mentioned.
I got a hawley retainer at the end of treatment, and I wore it a lot, even though my parents didn't make me (and my mom tried actively to have me avoid wearing it in public!) The few times I wore it to school were definitely very exciting to me.