I don't have any tats and have never had any desire to have any, but that is just my personal choice.
But something I learnt very early in life was as already mentioned, never judge a book by its cover.
When I was stil serving a number of years ago, I dealt with a bike crash where one of those involved was what would be described qute accurately as a well tatooed Hells Angel.
He was covered from head to toe in tats, long straggly beard, denims and the colours. A nicer chap you could not hve hoped to meet (and that is not meant as a sarcastic comment, genuinely he was a really nice guy).
Long story short, he was the genuine brain surgeon and being a hells angel was what he did and enjoyed in his down time.
He was articulate, well spoken, friendly, polite, in fact all the opposite features that preconceptions would have us believe, and as he said, he has to be all those things hen he was working, but when not working je went the opposite directon without the "criminal activity" it was the bile lifestyle that appealed.
But to look at him? You would never have guessed.
When my daughter said at 18 she wanted a tat, who was I to judge? It is her body. She now has 5 (albeit the only one visible is on the inside of her forearm), and she has a few bits of metal (although many have now vanished now she is working) but I certainly am not going to judge them on their choice of lifestyle, it is the person I am interested in not how they are wrapped.