Tattoos are a strong form of self expression, for the most part.  Tattoos are a way to remember and express a feeling about something permanently.  Tattoos at times can bring a negative view of the wearer unless the story is told, until than tattoos are thought of as either juvenile or bad news.  While, I will never get a tattoo myself I feel like tattoos are an incredible way to express something you feel strongly about, it requires a lot of dedication to get it tattoo'd permanently.  Things like September 11th are patriotic, and well means you care, and at a first glimps, im willing to bet people look down on the person prior to realizing what it is.  It takes a strong person to announce what they feel, and an even stronger person to permanently mark it on their body. 

Despite the negative view on tattoos I think it can definitely define who you are and the type of person you are by what you tattoo on yourself, the time and effort you put into it, and why you got it tattoo'd.  Everyone has their story, and a tattoo has their story permanently marked on their body and will forever remember it.