Who’s more dominant: Rabastan, through and through. Sure, Amy is pushy, but that doesn’t make him the one with the power in the relationship.
Who’s the cuddler: Amycus; he gets all touchy-feely (or he crawls over Rab and just lies there, and he’s heavy as a sack alright?)- and then sometimes Rabastan is just too tired and lets him.
Who’s the talkative person: Amy. Far too much. Maybe Rab just needs to get him a gag to shut him up. He’s considered it before.
What’s their favourite activity: Probably sex. Let’s go for the sex.
Who uses all the hot water: Amycus- what’s his thing about hot showers, anyway? It’s a waste of hot water.
Thing(s) they fight over: Barely anything. The little things, maybe, things which are barely even ‘fights’ and shouldn’t count.
Who does most of the cleaning: Rabastan. Because Amycus simply can’t be bothered to clean up even if it’s only a few simple (not so simple) spells.
Who sleeps while watching a horror movie: Neither of them? To be honest though the horror gets a little boring maybe a third of the way in (or less) and then after that it’s just kinky sex to the background sound of zombies dying.
Who calls up the super/landlord when the heat’s not working: Not Amy. Amy is just there in the living room with all the blankets and pillows and sheets piled up and up and up and refusing to come out from beneath all of it. No, it’s Rab, always has been and probably always will be.
Who’s the reckless and destroys things: Amycus. But Rabastan too. It just depends on which way you view the question.
Who does grocery shopping: Rab, because he buys the things that actually need to be bought. Amy’s trips to the market return with bags of candy and taffy and useless things that he liked.
Who remembers anniversaries: Anniversaries? What are those. Amycus remembers them though, oops.
Who cooks normally: To be honest, they normally get takeout. Rabastan’s tried making the food a few times, and it just… hasn’t worked out. Amycus tried too, just the once.
How often do they fight: Rarely, extremely rarely. There have been no real points of contention between them- maybe it doesn’t happen because Amycus is, contrary to how he normally seems, rather too willing to bend over backwards to keep Rab’s favour.
What do they do after fighting: Sex. Lots of it.
Nicknames for each other: Amy’s nicknames for Rab range from the weirdly adorable to the utterly absurd. Rabastan just prefers to use Amycus’ name as it is, or just not at all.
Who is more likely to pay for dinner: Rabastan, because he’s a gentleman.
Who kissed who first: Depending on the timeframe of the question, that might depend, but technically it had to be Amy.
Who made the first move: Rabastan.
Who remembers things: Amy is the one to remember things (oddly enough? Not oddly enough?). Rabastan just doesn’t notice, or simply forgets things as being unimportant.
Who started the relationship: Rabastan. Though it was more an arrangement then, instead of a relationship. The exact point in time it transitioned is unknown to anyone.
Who curses more: That shouldn’t be a question. The sheer mouth on Amycus. Maybe Rab really does need to reconsider the idea of a gag again.
A head canon: All the things, ever. But. There’s a nightmare where they die, just that nightmare, just that one time- (but of course it’s just that one time) and its bitter betrayal and screaming instincts, it’s blood and pain and utter darkness- and then its nothing at all. And neither of them wake up.