Well, I can be a very boring person; I guess "Tundra" could reflect that. On a lark I did put my name onto the license plate, "just because I could" so that counts for something too.
Wifey put some chemical formula onto her plate, that reflects her pretty well. The notion of being geeky, not that she has an acidic personality that is. [When we got the Camry I was looking at it, and said that it looked a bit big in the rear. Wife said that made it a woman's car, since both tend to get big in the rear over time. I said nothing...]