I design tattoos now and again when I have time because I enjoy creating something for people that has meaning and that they will enjoy. I can't tattoo myself but I may consider selling some of my stuff at some point. I have to agree that the Tribal tattoos are now getting out of hand. If you are getting one for a specific reason, be it that you are a mauri, then I see that point. However, tribal tattoos have become, for use of a better word, bastardized in that so many people have them and want them.
I believe that if you are going to have a tattoo, it should be something of particular meaning to you and not just something you saw and think 'That's cool! I'll get that tattooed onto my back.' I do feel for tattooists who constantly have to do dragons, dolphins, tribal art because there really is no pleasure in doing something so monotonous. Unless, like my example, you are a Mauri in which cause a tribal tattoo will have significant meaning for you. Oh, and I hate it when people get chinese lettering tattooed as well. Whats the point? If you have a message you want to convey, make sure people can read it.
I will say I have designed a few tribal tattoos myself but I have tried to get them away from being tribal. My best one is a cat fish one swimming under the water with a lily pad and a dragonfly on it. Bit cliched but it had meaning to me when I designed it.
I myself don't have any tattoos as I haven't seen, designed anything that has made me think 'that's something I want to have on me for the rest of my life.' I may get one one day. Just need to find/design the right thing.