I guess for me, names belong to my family members.
And I think you just answered your own question . . .
My wife dubbed my LT "The Mistress" because of the amount of time I spent riding it, working on it, talking about it online, etc.
That name has kinda stuck with each successive bike along the way.
Some people see a bike as simple transportation, as merely a collection of metal, rubber, and oil that serves a specific purpose. They tend to refer to bikes by the year, or the model number, or some other accurate yet mundane descriptor.
Others see it as a fun way to spend an afternoon enjoying the local scenery, or a long weekend exploring nearby states, or finally setting off on that epic journey to some far-flung exotic destination. They tend to give their bikes more personal names, in an attempt to capture the soul or essence of the ride.
I fall somewhere in the middle. The rider in me appreciates the overall feel and responsiveness of a well-tuned machine, the engineer in me enjoys knowing exactly how all these independent pieces come together to create the whole, and the poet in me revels in the experience of being transported through time and space in an exhilarating and visceral manner.
And yet, I learned long ago that it's not any one particular bike that captures my imagination, but more the fact of having any bike available, as long as it satisfies my current needs and desires. So I tend to get less attached to a specific bike but I will always have a bike in the garage, waiting for the next opportunity to turn dead dinosaurs into kinetic joy with a simple twist of the right wrist.