I was just asked what kind of PM I'm looking for in a candidate interview.
I've previously listed a lot of the great traits a PM needs in various forums. Even recorded a whole episode about it on The Startup Podcast.
But really, it boils down to this answer I gave on the fly:
Optimism/Conviction: To lean in and focus on the user above all else.
Cognitive Horsepower/Intuition: To recalculate quickly and work around roadblocks that get in the way.
Craft/Consensus building: Rally the team to have the first two.