I'm definitely curating as I scan my library. The first thing I look for is the potential for insight due to a host-guest paring that I may not have seen before - or that I have and it was pretty good last time.
If it's a news-driven podcast, I'll look for topical content I've been interested in lately.
After that, it's just what every topic I'm interested in at the moment.
I would also recommend very liberal use of the pause button. If the conversation is bubbling specific thoughts up in your head and those thoughts seem more interesting than the conversation - PAUSE IT. Nothing will be more relevant than your own insight on the topic. Once you've synthesized the thought, unpause and see how your thoughts compare to the podcasters. This is probably my favorite thing about the medium.
If it's a news-driven podcast, I'll look for topical content I've been interested in lately.
After that, it's just what every topic I'm interested in at the moment.
I would also recommend very liberal use of the pause button. If the conversation is bubbling specific thoughts up in your head and those thoughts seem more interesting than the conversation - PAUSE IT. Nothing will be more relevant than your own insight on the topic. Once you've synthesized the thought, unpause and see how your thoughts compare to the podcasters. This is probably my favorite thing about the medium.