I've been 
really into podcasts recently.  Typically I'll binge on something new for a few months, then discover something else to binge on for some time.  After I've cooled down from the binge, I'll come back to a show in more reasonable doses.  I have an obsession with catching up on shows, hence the binge.  
 
 Favorites: 
- 
My Brother, My Brother and Me (comedy advice show - many thank to fendent and booper for dragging me to a show and changing my life 

) ) 
- 
Wonderful! (one of the above brothers and his wife talking about things they like) 
- 
The Adventure Zone (D&D by the same brothers) 
- 
Hello Internet (CGPGrey and Brady Haran of Numperphile, Periodic Videos, etc talking about various topics) 
- 
Reply All (investigative podcast that loosely ties in with internet culture or technology) 
- 
Retronauts  (retro video games) 
- 
Digging Deep with Robert Plant (Robert Plant digs deep) 
- 
Behind the Bastards (probably the most serious of everything I listen to - pretty eye opening looks at bastards of history) 
- 
Stuff You Should Know (shorter podcast about interesting topics / tidbits you didn't know) 
- 
99% Invisible (design - I feel like everyone knows this one)