Ethan Coen — American Director born on September 21, 1957,

Joel David Coen and Ethan Jesse Coen, known informally as the Coen Brothers, are American filmmakers. They have directed over 15 films together that are often characterized as being "genre-bending", having covered comedy, crime, the Western, horror, thriller, gangster, drama, romance, adventure, and features of neo-noir... (wikipedia)

Being non-commercial is never an ambition. Movies come together at different points for fortuitous reasons. You do them as you get the opportunity, as opposed to doing them when you choose to or design to.
It's more interesting for me as an audience member to see a movie about a loser.
Like any kind of writing, there are good days and frustrating days. But even frustrating days can be rewarding sometimes.
We tend to do period stuff because it helps make it one step removed from boring everyday reality.
I mean, Joel talks to the actors more than I do and I probably do production stuff a little more than he does.