One of the dangers of making a movie about young people is it's potentially trite.

It actually took me 20 years to want to write about my youth. I was definitely always a little intimidated about writing about that part of my life.

When I was a TV director working on Judd Apatow's show Undeclared. I was surrounded by so many young people. People like Seth Rogen, who was 9 years old or something. It was just a ridiculous amount of talented young people. I started to think I'd like to see a young-love movie, but not one done in that glossy, Hollywood, high-concept manner we've become accustomed to. One that was, for lack of a better way of putting it, a little more ambiguous, '70s-style, where everyone was flawed, middle-class characters.

I think Stanley Tucci was having an affair with his mother. He had this odd quality that I haven't seen him ever get to do again in a movie that just made me think he's got some chops. He's got a strangeness to him, but he's also clearly been stuck in this role because of his looks and his type. He's been really pigeonholed, I felt.

I'm a huge fan of Zach's [Galifianakis] and I auditioned Zach a million years ago on a movie called Duplex which I was fired from. But Zach came in - It was like 2000, maybe - as a buddy stand-up that people were starting to notice and there was something about him I loved. He wasn't quite right for the part in [Keeping Up with the Joneses] and I got fired anyway, so who cares? But I always wanted to work with Zach.

Jon Hamm is incredibly good at playing people who have secrets and are hiding aspects of their personality, and obviously Don Draper had a lot of that.

I was in college - Carnegie Mellon, which is one of the reasons Pittsburgh was appealing to me - and I personally feel that whole world of what we used to call "college radio" is a big part of what kept me sane through a period where I stopped dating, I felt like a freak, I felt like no girl would like me. You know, a very adolescent response to losing my hair. I turned to obsessing about The Replacements and The Smiths and R.E.M. and getting further into The Velvet Underground. People who, in my sheltered suburban life, I knew of, but didn't know fully.