I also spend long hours behind the wheel, these keep my mind occupied and the trips seem shorter.
One of my absolute favorites:
Shawn Ryan Show
He has long form interviews from both current and historical event participants, both military and civilian. Many of these are folks that have had significant challenges in their life that they had to overcome. Episode 73 with Bedros Keuilian was awesome and should be required listening to all entrepreneurs.
Shooting related:
Miles to Matches
Rifles Only Accuracy
VP Precision
JTAC Precision Rifle
Military History related:
The Team House
Current world events from the eyes of a Vet:
World News with BK
Then there is Joe Rogan