I think a good podcast list is like a follow list, it's something you're constantly updating. Sometimes I add 2-3 at a time, other times I'll go through and cull it based on "haven't heard anything interesting recently," "too loaded up with ads, etc."

I've got 2-3 that are "ride or die", listen to fully every week. Reason Roundtable, DOGG ZONE 9000, and the Flophouse. These are all 1-2 hr, relatively structured shows.

I have some of the 2-3 hour "f around" genre as well, but those are more background listening.