For me, it was a form of personal expression. I'd wanted one since I was 20, never knew exactly what I wanted and figured I couldn't take the pain...I got my first one at 40. I thought I was done after the Phoenix, but I'm considering adding a sun between my shoulder blades, and slightly below them, for it to be flying toward. Then I'd be done for sure.
I think that a well-done tattoo, esp with color, is beautiful.