Royai?
Gives nose/forehead kisses: Roy, probably, the sappy little shithead.
Gets jealous the most: Also Roy, I’d imagine.
Picks the other up from the bar when they’re too drunk to drive: This is 100% Riza though now that I think about it, the reverse situation would make an interestingish fic. Either that or I read a ‘fic like that. Everything is fusing together.
Takes care of on sick days: Hmm, maybe Riza. While I could see Roy asking for help directly or indirectly, I feel like Riza would just want to be sick by herself.
Drags the other person out into the water on beach day: Neither of them are probably big on swimming, though I’d imagine Roy might be more into it when allowed to actually be, you know, unafraid for once.
Gives unprompted massages: Hmm, let’s say Roy is more likely to do this.
Drives/rides shotgun: Roy drives more often because it’s his car.
Brings the other lunch at work: They take turns doing it when the other is super busy and can’t really take the time to go and get it themselves and/or it’s just more convenient to send one person. They often eat together otherwise, though.
Has the better parental relationship: This is kind of a hard question since both their parents are dead, but I imagine if Roy’s parents had lived, he would have had a pretty good relationship with them.
Tries to start role-playing in bed: They’re a walking RP trope already, but mostly I’d imagine they wouldn’t be much into it in the canon; I think they’ve been through too much shit and would probably only really want to enjoy their time together like that if it were, you know, actually allowing them to be them. In an AU though, definitely Roy. Riza is not impressed.
Embarrassingly drunk dancer: Roy, though he’s probably not really that bad, just sloppy. I don’t imagine that Riza is much into dancing.
Still cries watching Titanic: Neither. They’re too busy nitpicking the movie details. But Riza secretly likes the story even though she criticizes it, and she’s crying on the inside. Sort of.
Firmly believes in couples costumes: Roy is 100% down for this. Riza is picky, though.
Breaks the expensive gift rule during Christmas: Roy, every single Christmas.
Makes the other eat breakfast: Riza. It’s really just something to get him out of bed in the morning if he’s being whiny about getting up.
Remembers anniversaries: Neither one of them will ever forget.
Brings up having kids: Riza. It’s an accident. She takes it back right away and tries to do so in as normal and serious a way as possible.