I like tattoo, I have some myself. I also like tattoo on men but it depends on the tattoo on the spot on the body. I'm not into face, neck or hand tattoo. sometimes, it doesn't look good on some people. Some hurts, some don't. Ribs hurts a lot but ankle not a all.
I don't mind tattoos - I'm rather indifferent to them unless the guy is absolutely covered in them, don't like that. I don't have any myself but my husband has a couple of cool tattoos that mean a lot to him. As for it hurting, I imagine bony areas hurt more than fatty areas.
I have a few and the pain is bearable if you want one go for it. One they start the tattoo you know that's how painful it's going to be for the rest of the tattoo. The only thing is if it's a big tatt you might want to do it in stages to have a rest.
Not the biggest fan of them, but some really small ones wouldn't be a deal breaker because I'm not a control freak and I would want her to be herself and live her life too :) Now this whole arm stuff, no.
I personally don't have any, so just my opinion, but on a girl/woman maybe something like a little heart or something near/on the breast wouldn't be too bad. I don't automatically think people with tattoos are "bad" but it's just not my taste.