I’m not keen enough on them to want one myself. So many of the ones I see look a bit rubbish when they are done, and do not improve with age, but that is possibly just because there are a lot of crap tattooists around. I generally wouldn’t judge anyone for having one, and I can understand why someone would want to tattoo a new nipple after a mastectomy, or cover a scar if they are unhappy with it.
I toyed with the idea of having a zip design put onto my c-section scar, but I thought that joke would wear thin quite quickly.
I hope that I am not the person that I was when I was 20; I am glad I didn’t get any permanent modifications done back then as I would have a very visible reminder of that person every day. I made poor decisions in so many things at 20.
The only ones that I properly judge are offensive ones (like swastikas done to identify political allegiance) or when you steal someone else’s precious culture (like a Māori tattoo on someone with no connection to that culture).
I like the ones that show achievement; I met someone with an Olympic tattoo recently, and I can understand the motivation for that one. I know a lot of people who have done extreme triathlons with a Norseman or Celtman logo tattooed on their calf - a useful technique to psych out anyone following them on a bike. I have no sporting achievements, so have never had to make that decision.