I'm going to answer these questions about Dramione, reference picture above. (these are my opinions, disagree all you want)

Who worries about what they will look like when they're older?
  Draco FOR SURE.

Who hogs the blanket?
  Mmm I think it could be either of them but I'm gonna go with Hermione.

Who eats the others uneaten pizza crust?
  Hermione. Draco never eats crust.

Who is more likely to cry over a sad book or movie?
  Hermione for books, Draco for movies.

Who talks smack while playing video games?
  Draco, I mean, have you seen the kid play quidditch.

Who sings along with the radio?
  I like to think Hermione starts and Draco joins in.

Who would enter them both in a talent show?
  Draco. We love a show-off.

Who would accidentally set the kitchen on fire while cooking?
  Draco, he's never cooked a day in his LIFE.

Who would throw the other into a pool?
  Splish Splash, Draco just got thrown in the pool because he was complaining about not wanting to get his hair wet. Hermione doesn't put up with that.

Who shops for groceries?
  Hermione.

Who kills the spiders?
  Hermione. But I think she would put it in a napkin and take it outside.

Who's the morning/night person?
  Draco is morning. Hermione is night.

Who proposes?
  Mmm Hermione. She's a Gryffindor after all.