Here is one of mine. Got it at Pirate Tattoo Reno Aug 2009. I used to be a big cat zookeeper and got the tat as a remembrance of the work I did with big cats. And for the fact that I am obsessed with dinos and the like and felt a Pleistocene mega-fauna tat such as an anatomy drawing of Smilodon fatalis, i.e. saber tooth cat, would be the best choice. Yep, I'm a science nerd.