In NV, I actually used to call my Laser Rifle "Ashley"... Because she "melts" hearts. Get it?
I think it was mostly of because the gun's low recoil and ridiculous damage... Also because of my EW skills. That gun just felt SO good and smooth and... intimate, even. At level 50 VH, I was precisely crippling arms and legs from afar, evaporates Deathclaws with half a magazine like a pro. After a couple hundred hours in, I basically became one with that gun.
Anyone with "NV Laser Rifle" on top of their "Top weapon list" get my personal "Damn Good Taste in Fictional Weaponry" commendation.
Anyway... We should be able to name our weapons, just like how it was with Skyrim's enchanting system.