I have the Decepticon symbol on the side of my right arm....I'm right there with ya in nerdiness, Tek...
EDIT: read Laz's post about people just getting tattoos to look cool...I agree with him...I definently put some thought into both of mine....one is my daughter's name, scrolling down the side of my left arm in the style of the Yankees "NY" logo...so obviously that has real meaning...my decepticon tatt is because they were one of my fondest childhood memories...had all the toys, comics, video, basically it's a piece of my childhood that I really enjoyed...I won't regret it when I'm 75, I don't intentionally do things I know I will regret...