I used to listen to the radio but have grown tired of the program format on just about every station and as i listen to it in the truck all week the last thing i want is to listen to a replay of the crappy jokes from the morning show all day .
I bought a transmitter / receiver unit for the TV that sends my foxtel to the shed and usually have it going as i record a lot of shows during the week and i would rather listen to a decent history show or maybe the V8 supercars than a replay of last weeks radio jokes .
Time team is a favourite along with anything to do with fishing , trains, planes , cars , bikes ,steam engines , science and how thing are made .
I usually only listen but make a mental note of anything interesting and can go back and replay anything of interest .
If i wish i can also play a dvd etc and i have a few from swarfrat , jfr etc that i enjoy .
When all else fails there is always star trek 
Ian