I did my undergrad at Cal and worked in a research lab Fernando worked in as well. I remember some of the postdocs were very nice and approachable. Others were

I did my undergrad at Cal and worked in a research lab Fernando worked in as well. I remember some of the postdocs were very nice and approachable. Others were very pretentious and cold. One thing the other undergrads and myself would always talk about was how nice Fernando was. He knew everyone’s name, would take the time to give advice, casually chat, etc. - overall a great person. Off topic: A big takeaway from working there was that those who accomplished the most were often the nicest. We’d have Nobel laureates come to and from the lab fairly often. They always seemed very grounded and passionate. The rudest people were overwhelmingly the ‘important’ bureaucrats and admin, with the occasional postdoc trying to make a name for themself. tl;dr Fernando Pérez is an awesome person all around.