I got my first on my left arm, the medical caduceus when i graduated x-ray school
I have mine and my wifes initials on my rt pec with a vine running through it symbolizing being together
Finally, I have a fairly large cross and thorns on my right upper arm.
It is my favorite and largest.
It has a deeper symbolism for me, but I wont go into a lot of deep detail about it in here. If you want to know, PM me and I'll tell you all about it.