I know how to separate my own laundry.
It's fun to play happy people.
First of all, the actor needs to get out of the character's way. You follow the character without judgment or prejudice or preconceived ideas.
I will admit, it's so intoxicating working with Steve Carrell. Creatively and professionally.
Usually in stories there are big problems in the beginning or couples are pulling away, there's a lot of bitterness.