There s nothing wrong with getting a tattoo of anything thats near n dear to your heart. For instance- my last tattoo is of my drumset... I took a picture of my set to my artist, let him add his signature style to it, and now I have my drumset-the one I ve had for over 20 years, spent uncounted hours up-grading, fixing, caring for, playing, and loving like a child....on my skin. When people ask me : "What is that?" I say : "Thats my set, I love it like a son"..... Just make sure that when you re 80 yrs old, you ll still want to look at it. Think hard, and dont be hasty. Good luck!
Meh, I don't like this idea so much. I'm not against tattoos. I have one myself. But your idea, as others have mentioned, is a bit too literal, I think. I'd go for something more symbolic that is pleasing to the eye, more so that Rs, Ls, and 4s anyway. I think you might regret this one later.