I just call them by their makers name or by color. My Dingwall ABZ is my Dingwall, my Fender P is Orange, T-40, etc... I think naming them like a pet or calling them 'she' is weird, creepy, and sexist.
Sexist? My aren't we sensitive. By the way, most non living objects are given female names like ships (except in the US), aircraft, etc. I don't really see how it puts women down in any way. Unless of course you call you bass bi***.