I use a Sony Z3 Compact with Pocket Casts. If I’m working I’ll connect the phone via. Bluetooth to my docked Fedora laptop for the audio (easiest Linux bluetooth setup I’ve ever done too!). If I’m flying I have a Bose QC25 headset to listen on. At hotels I have a Chromecast to listen though the hotel’s TV.
I don’t really drive very often any more but I can bluetooth to the car if I need to.
I choose Podcast Addict also on my Samsung phone. I tried an open source player for a while but it didn’t stack up with what I needed. Used to use Gpodder on my old N900 and still have it on my Ubuntu desktop, though rarely used there. I also tend to listen to many shows at 1.2x or 1.3x original speed using its builtin player, especially if the talkers have slower accents (which it does without changing the pitch, though very very occasionally I might need to go back and relisten to a bit I didn’t quite catch all of).