If you're into podcasting, give ATP[1] a shot: John is one of the three hosts. The other hosts are Casey Liss and Marco Arment (developer of Overcast).

John also has some other podcasts like Robot or Not[2] and Reconcilable Differences[3], but ATP is by far my personal favorite.

[1] http://atp.fm/ [2] https://www.theincomparable.com/robot/ [3] https://www.relay.fm/rd