I would talk to a tattoo artist about it.. As far as placement--Remember, no matter how classy or meaningful a tattoo is, many people are still judgemental about them, so place it in a place where it can be covered up. Like, lol, don't cover your face with that tattoo haha. Think about your body and where you think it would look good. Places that move a lot tend to fade quickly and places that are prone to weight changes(aka girls who get tattoos on lower tummy and then get pregnant) can mess things up.
My personal places I would like to get a tattoo.. Well, it depends on the tattoo. I know if I were to get a tattoo of something I want to remember--a daily mantra type thing or something that I need to have--to remember I'm loved, to remember to be strong, or to remind me of some belief that when I see it will strengthen me.. I like the idea of placing the tattoo sort of below the wrist. Like if you were to secretly write a cheat sheet on your arm right before a test. I can look down and see the image and remember why I'm doing what I'm doing and how I got there/who helped me get this far. Of course to have it look right to others it would look upside down to me, but just seeing the reminder is nice. For a place like that it would need to be small and classy though. But it's easily hidden under long sleeves.
I also like the shoulder area, right in front for guys but also in back for girls. I want a centerpiece on my upper shoulder/back area. Just a small simple tattoo, almost to have the same effect that a small necklace would(except on the back lol) showing my personal symbol for my art--my shortened signature. Kind of a label of who I am and what I do. It would be placed low enough that most shirts cover it naturally and it would only be seen if I were to like, where a dress that cuts low in the back and wear my hair up. Then it's just a pretty little symbol right there.
I also like the kind of off center lower back area--not tramp stamp, more towards the side, like hugging/wrapping the hip. This is where my largest tattoo would be. Kind of a compilation of all of the things that are important to me. It all will start with a tattoo of a grizzly bear standing next to a lamb. Represents the relationship my grandfather and I had--He actually went by the name "Bear" and always called me "lamb"..He always was behind me and pushed me forward. He sat me down to watch animal planet, he subscribed me to National Geographic, he bought me almost all of my art supplies. Whatever dream I had, he'd do his best to make it a reality. So the loss of him really struck, but I know he's still around being a big protective bear ready to save me whenever anything goes wrong, so I love the idea of showing that through an image to take with me forever. Behind the animal duo I would later add bits of nature..maybe a tree that can start to morph and form into other things. Maybe animals to represent my love of nature, but also symbols related to art and other things I find important in my life. And of course, on my torso the tattoo would almost never be seen, except by those close enough with me who share my feelings and would really understand them. It's a more personal tattoo, so I guess it would be closer to my body.
BUT..that is just me. Everyone is different. Some people like to have HUGE letters going across their back, some people just like tiny words in cursive, a whispering reminder. It's also your body. Know your body and shape and figure out where you think a tattoo would look good. Maybe get a henna kit and get someone to draw a 'test' tattoo on you. Wear it on you for the week or so the henna lasts and see if you like the placement. If not, try again. Then of course also take into account--can I hide the tattoo if needed? Sadly it's important, no matter how pure the tattoo idea is. Also take into accoount pain--Closer to bone, the more it hurts. Ribs hurt, ankles hurt, hands hurt. Etc. :) Talk to your artist--make sure he's good at lettering, not everyone is. Ask him about it being in Irish or English. Talk to family, friends, etc.
Then when you get the tattoo..make sure you take care of it!!! It's awful to spend so much to get a really good tattoo and then have it get infected and ruined forever!