My Dad had one. He got it in Hawaii when he was 19, working as a civilian (before Pearl Harbor). From my earliest recollections I heard it was the stupidest thing he ever did, how sick he got from it, that he knew of sailors who were court martialled for getting infections from tattoos, etc. So, for me, it was never an option.
But I did like the idea one woman I knew in college had. She kept threatening to get a tattoo up her left buttock reading "Mattel."