[Hugging this Character] Brooke will pretty much always be okay with being hugged, unless you're a zombie. In that case he might scream a little, but you can still go for it!
[Kissing this Character] You might make Brooke nose bleed if you did that, but I'm still fine with it. Well if it's a female character, if it's a male he might kiss you back thinking it was some grand joke.
[Inappropriate touching] Go ahead. If you're a male character, Brooke will most likely glare at you with his eye sockets and kindly ask you not to do that again. If you're a female character, he might nosebleed, blush, laugh, grope you right back, or ask to see your panties.
[Lovers] Yeah right. He wishes.
[Punching this Character] Depends on the person who punches him. If it's a friend he might ask what he did wrong and apologize (very pacifistic sometimes) and if it's an enemy he might draw his sword and start trying to slice you up. Sometimes, he'll just take the punch like a man.
[Easiest Way to get on his good side] Laugh at one of his many attempts to make you laugh.
[Easiest way to get on his bad side] Hurt those he cares for, insult the rumba, or bad talk his music.
[Hacking his journal] You can most likely just go right ahead. You might need to ask if there's another person involved though.
[Can he hack Mine?] Nope.
[Fourth Wall Breakage] Ask me first, sometimes that scars him.
[Shapeshift/Bodyswap/etc.] Ask me first.
[Maim/Murder/Death] All of these are somewhat okay. But keep in mind it's rather hard to kill a skeleton who ate the resurrection devil fruit. Also it might upset other players if I got him killed off, so you should run it by me too.
[Blood] It makes him queasy.
IMPORTANT NOTE!!!: Never, ever, ever, harm his hair.