Send a ship/bro-ship/friendship and I'll give you who:

• Who is more affectionate? 
  Roland, by far. Although the universe’s they’re in really vary, I think that Roland would be more affectionate in both of them. Even if he happens to be a crude little shit in one.
• Who angers the easiest?
  Rosalind. Especially in the Rapture verse because she is jaded and unsuccessful. No one ever keeps her company either, so I would imagine that she would be more on edge and aggravated with people who are disrespectful or doubt her.
• Who is the one too drunk to drive home? 
  Roland. Always Roland.
• Who’s the the one bandaging the other after a fight? 
  Rosalind doesn’t get in fights (and if she does, they aren’t her fault whatsoever). Roland would probably say or do something that would get a guy to deck him in the face or some shit, so Rosalind would inevitably feel guilty (even though she shouldn’t) and help him out.
• Who is the one to pull the other to try new things? Like the weird restaurant down the street or skydiving.
  ROLAND. He’d consistently be urging her to go and do things all the time while she is perfectly content of what she’s familiar with now. 
• Who is the driving/riding shotgun? 
  Rosalind is driving while Roland is in the passenger seat, forcing her to listen to music he enjoys.
• Who has the weirder taste in music? 
  Roland. 
• Who tears up during  movies? 
  Roland, obviously.