1) Tatoos fade over many years, which means yearly renewal pain if you want them bright and clear. This is most true if you have them where you loose a lot of skin: hands, forearms, or ankles, for instance.
2) Tatoos, even fading, will last many years. Make sure you pick something that isn\'t going to cause you a problem 5-10 years from now. If you put something like "Guns \'n Roses" on there 10 years ago, fine, but now, that would be stupid. Make sure you tatoo will age well.
3) Be carefull puting satanic or very "dark" images on a tatoo. Your views about such things will probably change if (and I do mean if - some girls don\'t like that stuff) you end up married with kids in the next while.... (Not that I know how old you are now, I\'m assuming 16-22).
4) If you do get a tatoo, make sure you research where you will get it. First, you will want to find a place with a talented and experienced artist. TRUST ME. Second, you will probably want to save money, but it is often better to go to a higher class establishment, and pay a little more, and get info on the tatoo when you are having it done, as well as a plain better job of it.