Influences
I've spent hours reading or listening to these people. I consider each of them to be leading experts in their field and great at communicating that expertise. The people on this list have been significant to my development and I recommend their work.
Embedded Electronics & Firmware
Phil KoopmanElecia and Chris White
Phillip Johnston
Jack Ganssle
Michael Barr
John Regehr
Ken Shirriff
Software Development
Joel SpolskyJeff Atwood
Scott Hanselmann
Raymond Chen
Michael Lopp
Security & Encryption
Mikko HyponnenSwiftOnSecurity
Alan Woodward
Rik Ferguson
Bruce Schneier
Science and Skepticism
Carl SaganIsaac Asimov
Steven Novella
James Randi
Jim Al-Khalili
Phil Plait
Ben Goldacre
Simon Singh
Sean Carroll
Philosophy
Daniel DennettMassimo Pigliucci
Alex Malpass
Matt Dillahunty
Julian Baggini
Psychology
David McRaneyOliver Burkeman
Richard Wiseman
Chris French
Worth Following on YouTube
Whilst some of these are not quite at the level of those listed above, these channels are recommended:
Electronics
SDG Electronics - Steve GardnerEEVblog - Dave Jones
Marco Reps
GreatScott!
Kiss Analog - Eddie Aho
w2awe - Alan Wolke
VoltLog
mikeselectricstuff
Cybergibbons - Andrew Tierney at PenTestPartners
The Signal Path - Shahriar Shahramian
Prof Sam Ben-Yaakov - Professor at Ben Gurion University
Embedded Firmware
Phil Koopman - Associate Professor, Carnegie Mellon UniversityQuantum Leaps, LLC - Dr. Miro Samek