My Trek hybrid is called Rainbike, since that's what it does, and my purplish Trek roadbike is named l'aubergine... because Purple People Eater would be too insincerely americaine for me to get away with. Perhaps not the best names, but descriptive, at the least.

I did once own a Lambretta 150 named Beatrice, or "Triza," after my cousine, of whom I had an adolescent crush (the girl, not the scooter.)

I find it difficult to bond with vehicles that have not been named, and the many nameless bikes & motos of my past just fade away...