Bottom Line - there's ten guys for one job even after selection. Why choose the guy WITH the tatoos over the one without given that some customers have a negative view of people with them? Choose the other identical guy without the ink. Easy.
So if you've got 'em, hide 'em.
I have no view either way as I have friends with them but I'd have to be at gunpoint to have one myself.
Good luck with your dream. I'd love to have you as a guest in my flightdeck in return for a trip in the cab of your train. I've often wondered how the operations differ/compare. Unfortunately the stupid irrational illogical rules made by the little people shrieking SECURITY means it will never happen.
WWW