When you start taking a look at the different kinds of tattoos that you can get, you are going to see a lot of different styles. For example, you can choose from what are called Naturalistic, Abstract, Pledge/Memorial/Dedication, Complex Structures and Combinations, and Stylized tattoos. All of these offer something different visually. For examples, here is a simple rundown of what each type is:
Naturalistic - images designed to look as real as possible using proper shading and detailing.
Abstract - usually includes the more archaic designs including Celtic and tribal tattoos.
Pledge/Memorial/Dedication - probably the most popular of all types of tattoos, these can include everything from the classic heart and banner, to military insignia, to remembering loved ones with simple initials.
Complex Structures/Combinations - these are usually the most unique due to the fact that they usually include a collage of different images that have no specific tie-in to one another.
Stylized - these are also very popular as these are images, such as a butterfly or flower, that are more like a fancy outline drawing rather than being a detailed realistic picture.