I mostly favor horse names.

Bikes I have now:

Bridgestone RB-T - alternately known as Gertie and Rocinante

Bianchi Alfana - Shadowfax

(unpainted) Litespeed Classic - still unnamed. "Silver", as in the Lone Ranger, just doesn't get it.

Bikes I no longer have:

Brown Schwinn Continental - retroactively named Sheldon...

Trek 400 Elance' - Bucephalus

Naming my bikes is an ordeal. Usually the name comes to me during a too-long summer ride when I'm semi-delirious with heat and dehydration.