I've been a big fan of podcasts as a medium since I discovered them about eight years ago. There's a huge variety of them, from fact to fiction, single narrator to full casts, and many of them are free (with advertisements and/or requests for support). Unlike TV or reading, you can listen to a podcast while driving or walking around and doing chores. This is also true of audiobooks, of course, but most podcasts have an episodic or even standalone nature that allows you to listen for a limited amount of time and then go on to do other things.
I started volunteering for the Skiffy and Fanty speculative fiction fan website back in 2014, first as an occasional reviewer, then as a review editor. In 2015, I started appearing on occasional podcasts, too, as my schedule allowed. Half of those so far have been "Torture Cinema" episodes, when we take a bad movie and have fun dissecting it; another was a discussion of a good, or at least really interesting, movie; I also co-interviewed an author, and participated in the 2016/17 roundup episode. In 2016, I even did the audio editing for one of those episodes.
Also in 2016, Librivox released an audiobook for which I had narrated a couple of chapters (and did my own audio editing). "The Secret Power" by Marie Corelli is a 1924 novel, featuring a female protagonist in a steampunkish science fiction setting. The writing is a bit old-fashioned, but it's worth checking out, for anyone who is interested in the history of the literary genre.
Toward the end of 2016 and into 2017, I also started appearing fairly frequently in the Supergirl Supercast, part of The Incomparable's network of podcasts. I don't claim that Supergirl is great television, but it is fun to watch and discuss its features and flaws with other fans.
I've been tweeting out links to projects as they've been released, but I've never gathered them in one spot before. By popular request (two people just last week, and other people previously), here's a list of podcasts and other audio projects in which I've participated:
Crimson Peak movie discussion
Barbarella Torture Cinema
Sarah Kuhn author interview
Aeon Flux Torture Cinema
Fantastic Four (2005) Torture Cinema
The Secret Power, via Librivox (Chapters 14 and 15)
Supergirl S2 E1-2
Supergirl S2 E7-8
Supergirl S2 E9-10
Supergirl S2 E11-12
Warnings: The Torture Cinema episodes definitely contain lots of NSFW language, and some of the other episodes may contain some too. The Crimson Peak discussion includes references to horror and sexual situations. The 2016/17 roundup starts off with a few minutes of unhappy political discussion, although we quickly move on to talking about movies/books/etc. that we enjoyed in 2016 and are looking forward to in 2017.
Supergirl S2 E15