if his girl likes him she wont mind a tattoo. If she does she's not the one
Maybe, but I find when dealing with girls on a day to day basis (not everyone you meet is a nerd), it's best not to bring up video games or star wars etc, unless you know the other person is a huge fan. It's kind hard to hide that if you get a tattoo. Trust me, I have embarrassed myself plenty by making that mistake
Being well rounded when dealing with people helps a lot with your social life, or at least that's what my experience has taught me.