The first time the TMNT fad came around, a gopher tortoise kept crawling into my Florida yard, from the forest across the street. Because the other turtles were named after Italian artists, I named this visitor "Giotto." His/her personality was kind of two-dimensional, like the original Giotto's paintings.
I had a TGT for years as a pet - she would hibernate in the hall closet in november, and come out in early april.