I would guess I'm not alone in this, but all of my guitars have names:-
Antoria Cherry Red Strat is called "Old Red" because it's old and its red - a nod to Neil Youngs Les Paul
Vintage SG copy is called "Angus" because it's Angus Youngs guitar (although not a Gibson)
Old nylon string acoustic is called "Juan Carlos" because it's Spanish.
I've just bought a Takamine G-Series cutaway semi acoustic, but I'm struggling to come up with a name for it at the moment, any sensible ideas you may come up with will be greatly appreciated.