I'm the opposite. I often worry that I listen to too many podcasts. When I'm out running, walking to work, cleaning the house, playing games that don't require my full attention, when I want something to send me off to blissful sleep.
Recently I've been burning through the /Filmcast (which is pretty great), catching up on No More Whoppers (which can be hilarious), and I've also been checking out some of the earlier episodes of Radiolab that I missed.
There's such a disparate selection of great podcasts out there. I'm sure there are more than a few that you would find interesting.