Two things that jumped out to me in Jack Dorsey's email announcement that he'll be stepping down as CEO of Twitter.

1. How he describes new Twitter CEO, Parag Agrawal: "He's curious, probing, rational, creative, demanding, self-aware, and humble." I love this as a description for any great leader, and I think most folks with experience at high-growth startups recognize the best CEOs have both curiosity and conviction.

2. How Dorsey describes new Board Chair, Bret Taylor: "He understands entrepreneurship, taking risks, companies at massive scale, technology, product, and he's an engineer." Again, anyone with exposure to boards at a high-growth startup recognizes the need for aligned values. There are varying degrees to being "risk-averse", and in my experience, it is not always the case that each board member can stomach the risk that a CEO can, especially a CEO Founder.