Qualities a playwright needs?

I'm studying under Jane Bodie (a great playwright) as part of the Royal Court Writers' programme. One of the questions we are asking is:

Qualities that that playwrights need?

I think it's a question writers should come back to, every now and again, whether they write plays or in another mediu. Of course, there's no "correct" answer, and whatever answer one does have will probably change day-to-day, year-to-year, relationship-to-relationship...

We came up with (amongst others):

life, language, experience, imagination, sadness, joy, emotional access, flair,

perception
observation
analysis
commitment
articulation

Interestingly, Jane suggests articulation is the one thing she can teach something of. The rest might be unteachable.