A bodhi leaf is a small, heart-shaped fig leaf from Asia which comes from a bodhi tree. The tree is of incredible significance to Asian and Buddhist cultures because the Budda sat under a bodhi tree when he attained enlightenment. A bodhi leaf tattoo could show your Buddhist beliefs or a never-ending quest for transcendence.
Marijuana leaf tattoos are very common, but not because of their beauty. Getting a marijuana leaf tattoo shows that you are a rebel and a lawbreaker. It's a good way to signal to people what you like to do at home and what your lifestyle is all about, but beware--it's also a good way to signal those things to law enforcement.
Maple leaves have multiple meanings. First, a red maple leaf against a white background is associated with Canada, since it's on their national flag. A red maple leaf tattoo would show your Canadian heritage or sympathies. If you are only half-Canadian, half a maple leaf would make for a funny and inventive tattoo.
In Japan, maple leaves are a sign of the passing time. Artists depict them in groups, blowing and drifting in the wind. This tattoo could show your appreciation for life or wisdom attained over time.
The olive branch is an international symbol of peace. Depictions of the branch always have it budding with olive leaves which represent tranquility. In ancient Greece, emperors wore golden crowns or laurels designed to look like olive leaves. Crowns of actual olive leaves were presented to victorious gladiators. Olive leaf tattoos could show your interest in Greek history or your love of peace and calmness.