I'm curious about that, too. I know haircuts I used to think looked great now look silly in retrospect, so I shy away from anything permanent like a tattoo. I wanted an armband for years and the only reason I didn't get one was my partner objected. I hear they are uncool now... lol. But on the other hand, it could become a landscape of where your mind was at different ages, a roadmap of your progress through this world so I'd love to hear from you inked guys.
You make an excellent point - the transient nature of style, fashion, and fads. What's hot today isn't hot tomorrow. But you're stuck wearing that tattoo for life. Possibly becoming a dated, anachronistic throwback to a time past. And in the worst case, people may not even know what your tats mean, the references forgotten, too outdated for future generations to know.
I have 1 tat, a medical one I created to replace my medic-alert epilepsy bracelet. Initially I wanted the tat to resemble the bracelet, the tat on the top of my wrist, maybe a bracelet facsimile around the rest. But the tattoo artist suggested under my wrist, instead.
He said that's where first responders will go for a pulse reading. And see the medic-alert tat. Brilliant! I said in that case, let's enlarge it beyond bracelet size, make it jump out. With the word "EPILEPTIC" alongside it.
It's very discreet, you usually won't see it. I've shown it to doctors and health care professionals, and they all strongly approve, think it's a great idea. My epilepsy ain't ever going away, with me for life, and I'm not ashamed of it. Would rather people know about it when dealing with me, should I go into seizure. Denying or hiding it won't make it go away, merely deny me a proper response.
And I don't think people today are spooked by an epileptic being in their presence. I'm usually quite well-behaved (at least regarding personal medical matters). But decorative ink I continue to avoid.
At one time I thought I might put the names of all the different motorcycle brands I've owned on 1 arm, and their logos on the other arm. And believe me, they would fill my arms from shoulder to wrist.
But I was still riding, and thought maybe I'd still buy other brands, gotta leave room. And now that it looks like I won't be riding much again, or likely would buy a brand I've already owned, nothing additional, I'm kinda down on ink. Too old for it now, for one thing, would just look foolish on my spindly arms, and since I don't have a bike at present (my husband forbids it).