Most of us have heard of the funny stories about Chinese character and kanji tattoos that are popular among non-asians. While kanji script is beautiful, it is not going to seem so exotic if you ever take a trip to China, Japan or your nearest chinatown. Celtic knot and cross tattoos were almost as popular as Riverdance, but there is a good chance your beer mat will have a matching design the next time you visit an Irish Pub.
Popular tattoos might have significance and meaning to their owners, but with so much excellent skin art in a place like San Francisco, you might be judged by the quality and originality of the tattoos you choose to display. A free brand logo tattoo will look about as cool and significant as a sweatshirt with GAP across the front.