I listen to too many podcasts in general, so I have periods where I listen to nearly every pinball podcast I can find. I actually just cut back so that the remaining episodes of Slam Tilt don't get buried in the huge backlog I managed to amass...as long as you listen regularly (and on 1.5x speed...) keeping up can be somewhat manageable, but I hadn't been doing that, so I had several episodes from August in December and my phone storage was a bit cramped.
At this point, there are pincasts for most niches within the hobby, and several podcasts are interview-focused and/or region focused. When I'm not on a severe podcast diet like I am now, I listen to podcasts from any region and from any niche, since talking about pinball, in general, is something I find entertaining and interesting. Even podcasts that I'm not 100% thrilled with can be entertaining to listen to with some segment or other or with a particular interview, and it is fun seeing how the hobby manifests in different areas and seeing it from different perspectives.
As for my personal podcast preferences beyond "support ALL the pincasts," the one I most regularly listen to is Slam Tilt; beyond that, I guess it's Head 2 Head, Mrs. Pin, Pinball Players, and Pinball Profile, though I have no idea how my listening habits will be affected once Slam Tilt's distinctive yellow icon stops showing up in my feed. My plan is to reintroduce all of the feeds I've temporarily backed off from, but we'll see. Slam Tilt would be the podcast I looked forward to most in my overabundance of episodes. It may be less tolerable to maintain a heavy listening habit without that carrot popping up regularly in my feed, and I have no idea what will replace it as my Favorite Regular Podcast.
Pinball podcasts are good, though. There's a few lists of podcasts floating around Pinside and elsewhere and those are a good starting point for finding the ones that jive with your tastes. Different lengths, different focuses, and, overall, it's pretty much all good.