To find the right tattoo is not so easy job to do. Your tattoo has to be something that is a part of your life. Few decades ago tattoo was something that was with you to the end of time. Today we have technics that can easily 'clean' your skin and tattoo will be gone, but hey - who would want to make tattoo to pay someone to 'wash' it off few days after?
In the Internet you can find plenty of tattoo designs, there are angel tattoos, dragon tattoos and whatever you want, but most of them are only typical drawings that are pretty but are not prepared to use in on a surface like skin. Our skin acts different than a piece of paper so there is a special way to design drawing that will be a tattoo.
To design a tattoo it is a good idea to speak with someone that really work in a tattoo studio. Most of them are really helpfull and will speak with you and advice you for free.
Second way is to find a special (studio) designs. Below I give you free samples of pages when you can find proffesional tattoo drawings like from Miami Ink.
See this: