Tattoos
Family Crest? Something that has meaning in your life, portrait, asian theme (koi fish)(dragon)things that represent meaning like, life, strength, etc etc. Tribals, Maori tribals are cool, some celtic are nice.
Also think about if this tattoo is one of many, if doing tribals, some people stick with one type of style and do arm sleeves, chest, back, legs.
If being your first tattoo, think about your future employment, if getting arm sleeve, might have to wear long sleeve to work, so some people take that into consideration and just get tattoo'd around the bicep/tricep area. Nothing below the elbows. Same goes for neck, face, wrists-hands...and other parts of the body that may be visible with clothing on.
Besides that, can't think of anything else right now, just remember, laser surgery tattoo removal hurts more than the actual tattoo. Doesn't pertain to those who love pain :3.