I want a KD tattoo, but I feel like I'll regret it in a few years. I never want to regret something KD-related, so I think I'll hold off. But if you're going to get one, get the symbol that means the most to you, the one whose meaning you hold most dear to your heart. I really want a white rose, since for me, those hold the most significance. I have another sister who's all about the dagger, though. It's up to you! Good luck!
ETA: Fyi, Kappa Delta policy is that it is
in "poor taste" to have the crest, badge, words "Kappa Delta" or the greek letters
KΔ (or KD) tattooed on the body. Just so you know! 