"In the past I was always drawn to the roles, and was often really exploring characters, but then the final result was not what it was supposed to be," the actress, 32, tells Nylon in its April issue – the magazine's 15th anniversary.
"My modus operandi after I had the baby was to work with great people, no matter the capacity, even if I had a smaller part."
Marlowe, the actress's daughter with Tom Sturridge, is now 20 months, and Miller has said in the past that being a parent has given her "incredible perspective."
Miller, who stars in the upcoming films Foxcatcher, Business or Pleasure and Mississippi Grind, even rebels against the all-pervasive selfie.
"I'm not very good at the selfie face," she says. "I can do it for, like, three seconds and then I crack up."