My former Tornado was called "Disaster Area". My current boat is "DoubleMint" since it has dark green/minty decks. I've got a Marstrom on it's way and I'm starting to think of a name for it. So far I've got "Full Tilt", "Twister", "Snuffleluffagus" (a reference to the spinny snuffer), or since Tuesday, "Terminator" refering to Arnold S.'s win here in CA.

Other names I've seen on cats over the years:
"Psych Job" on an 18SX owned by a psychologist.
"Shear Force" on a T-boat.
"Peppermint Catty" on a light green T-boat.
"Panty Buncher" a T-boat once owned by the daughter of a former Tornado Builder in Canada (SailCraft).
"No More Mister Nice Guy" on a T-boat in Toronto.
"Katamoorangmaroo" on a T-boat.
"Great White" on a T-boat
"Blew Job" on a blue T-boat.