I learn something each time I hear him speak.

He reminds me of that old EF Hutton ad:
"When (Pete) speaks, people listen."
I'm (obviously) already a supporter, I have attended one each of Chasten's and Pete's fundraisers, and have watched almost every video of every major interview and townhall elsewhere, and I'm impressed by the fact that Pete manages to say at least one fresh thing every time, often during his (inevitably thoughtful and knowledgeable) responses to tough and/or completely unexpected questions from the audience. And he always, always manages to connect the dots between listener concerns and other issues, and to connect the dots between issues, generally.
I've also never heard any "gaffes" from him, not even once, in more than a year of campaigning.
The man knows his stuff, and can think on his feet. I find him a reassurance and a breath of fresh air.