I can help a bit here.
An approach to Gin's private lifeGin-- the top of the Black Organization who works on all evil deeds. His true face is completely covered in mystery. From many pieces of information, we made a daring guess about his private life!
Hair -- swaying, long , straightWaist-length, beautifully straight hair style. No doubt it is well-cared.
Fashion -- always looks good in his same usual wayHe dresses smart in black trench coat and white high-necked. Comparing to Vodka who also dresses in black, by far he looks much more stylish.
Hobby -- a classic car aficionadoPorche is his choice of vehicle. He is very fond of this 50 years old 356A model. Considerable sum of money and care are a must for maintenance. Perhaps he's such a car mania.
Heart -- charmed by a beautiful voiceLooks like he's fallen in love with a singing voice of a songstress at the bar. The only time his heart is relaxed, maybe?
Motto -- efficiency matters for a man who gets things doneHe moves out quickly when it seems to go in the wrong direction. A snap-decision maker.
Idea -- always a verse in his mindWhile shooting, he effortlessly comes up with a poetic, metaphoric expression. Usually you couldn't do that without some practices. He's actually a poet or what...!?
Love -- a memory of naked Sherry from her backWhen thinking about Sherry, he seems to have her naked body crossing his mind. Is that also a case for anyone? And does he have any special relationship with Sherry...?
An inference
Gin is living in large, one-floored studio connected to garage.Based on his personality, he would not wastefully decorate his home . Only his favorite Porche, however, needs maintenance, and he definitely places it within his sight. He may keep a stock of same design, black summer and winter clothes. The rest of our imagination is as shown below.
(text in the picture)
Left tag on the thought balloon: "naked"
Thought balloon: "Ah, Sherry... like the moon shining upon the earth...nah... like the moon shining through the dark..."
Right tag on the thought balloon: "(he's) composing a poem"
Top-right corner: "Porche 356A on the other side of the glass"
Next to the wardrobe: "A lot of spare black clothes"
Tag on the hairdryer says hairdryer.
Tag on the bottle: "Sherry"
CD player: "The songstress' song"
Bottom-right corner: "He makes it a rule not to keep useless things around."
Bottom-left corner: "This picture is an image."
Remember, people, it's just a guess!
Anyway I got carried away. I've always considered Gin having a refined taste with some slipped common sense.
Aww...what an adorable guy...
.
