A tattoo choice should be based on your own personality and uniqueness as an individual. Many times people get the same tattoos that they see other people getting. Instead of going with something unique, they go with something thats "popular". Here are a few great ideas for a unique tattoo:
1. Comic Caricature. While there are a number of common cartoon or comic caricature tattoos out there already, there are also a huge amount of untapped cartoon caricatures that are rarely if ever seen displayed as tattoos. Every one usually has a favorite cartoon or comic character from their childhood that at the time stood for something special. A great unique tattoo idea would be getting a not so common comic caricature tattoo.
2. Abstract Art/Outsider Art. There are many new outsider artists that create interesting drawings, shapes, forms, figures, and caricatures. Every now and again you'll see a tattoo that at first glance appears rather odd, but then you become drawn in to its abstract form. Some outsider art tattoos are more simplified. Stick figure drawings with different coloring for instance. Often times these are images from the outsider artist him or herself. Having a design made for you by the artist or buying one of his pieces could be an excellent unique tattoo idea.
3. Unique Tattoo books or collections. Now days there are places where you can go online and view hundreds of unique tattoos that likely you've never seen before (I list an excellent site below). They go beyond the usual tattoos you see in catalogs and bring out very well done, artistic and incredibly unique ink ideas. This is a great idea if your looking for a great looking, unique tattoo.