Just recently, I began calling my Q60 AWD "Snow Slut" as we've been getting a lot of snow and freezing conditions here, and she does real well in these conditions. But, I doubt I'll always call it that, I usually don't have a name for the Q60 as I am not too attached to it.
I also have a Nissan Titan I've owned for 12+ years, that I love to death.....she's called "ol girl" kinda like a reliable old dog.
My wife has a "Flame Blue" Corolla HB that we called "Smurfette".
I use female names from games and anime....geeky/otaku/weeb shit, I know.
'83 Mazda RX-7, Tsunade - Naruto (it was old, still looked good)
'89 Nissan 240SX, Muchiko - King of Fighters (it was my Whip)
'95 Nissan 240SX, Kula - King of Fighters (the AC in that thing was ridiculous)
'07 Nissan 350Z, Ibuki - Street Fighter (I just liked the name and Ibuki is my favorite female from Street Fighter aside from Rose)
'10 Nissan 270Z, Hinata - Naruto(Wore Purplish Grey, had Blue eyes)
'11 BMW Z4, Hilde - Soul Calibur (I try to use names that match the nationalities)
'16 Infiniti Q50S, Sakura - Naruto (the sport wheels reminded me of Sakura petals)
I had Michonne (Walking Dead) picked out for my C8 but since that plan went to hell, Nezuko (Demon Slayer) is what I'm leaning on for the Z.