I was nervous when I started below t-shirt line. Being a professional, I wasn't sure how it would go over. I wore long sleeves while at work for about a month. I finally realized I just didn't care. If I'm good enough at what I do or the service I provide, it shouldn't matter. So I stopped. I've come to find, even when meeting with millionaire developers or "old money" powerful people, the majority are mainly curious.
In fact, even at big meetings, it seems lately that the first 5 or 10 minutes is questions about my tattoos. Of course the first one is always, "did it hurt?".
The only time I wear long sleeves now is for protection from the sun, if I'm going to be working in the field all day.