I have a selection of Lego Star Wars ones. My favourite t-shirt though was one I had a few years back. It had a picture of a chess pawn covered in ammo belts and grenades pointing a gun. It read simply "Hardcore Pawn". I loved it. Not least because of the hysterical image of my gran's face when she first saw it.
Regrettably a quick Google Images search reveals that, although the same shirt is still available, it now has a joint in the pawn's mouth which is not quite what I want nowadays.