I called my first car "Brown Piece of Sh!t". It was an honorary name.
My 97 LT1 Firebird I called "Damn IT! You broke again?"... Well, at least that was what I said the most around it.
My 2002 Trans Am I called "My Baby!" And she was!!! Until the tramp went off with someone else.
My 90 Z I call "Sweet Heart" because that's what you call girls when you want something... I just want Sweet Heart to start when I want to drive.