For wrestling fans:
"The Attude Era Podcast". Hilarous to hear 3 british guys rambling about 20 year old wrestling events like it just happened!!
For books on CD fans:
"We're Alive- A Zombie story of Survival". A real cheesy but fun drama.
For Movie Geeks:
"Screen Rant Underground". Fun Sci-Fi, Super Hero, and Horror movie/TV show talk.
For NFL fans:
"The Rich Eisen Podcast" is about the most entertaining podcast I listen to, period. The man is a rare talent and makes anything interesting.
"NFL Network: Around the League"
For general sports:
"ESPN First Take", a replay of the entire show.
And 2 Boxing podcasts for the rare boxing fan like me:
"ESPN: Heavy Hitting"
"Boxing 4 Free"
There are dozens of great Faith podcasts as well.
I love podcasts.