I appreciate the feedback, and I just wanted to say that some of these broader or more popular topics—for me, at least—are chosen mostly out of necessity. Preparing for a show takes hours and hours as-is (I average about 3 hours for every set of show notes), so it really helps to already have some knowledge going into a topic. I also like to replay the games we talk about, so you can factor in 5-8 hours of that sort of "research" per episode as well. That said, Japanese games are kinda my thing, but, with each set of episodes we record, I try to at least do one outside of that subject matter. I'm definitely making an effort to include more PC stuff, since I did (and do) A LOT of PC gaming in my life, and I'd like the show to reflect that in some way.
The thing is, when we were doing our backer-requested episodes, we would often work the requesters to choose topics they like that were more approachable for us—at least I did. Still, we did get some criticism (which I agree with) that some of these shows lacked energy, since we were cruising along based on dry notes and research, rather than our own experiences. Then there's also the fact that we need our guests to be aware of the subject matter as well, so if we did a series overview of, say, Derby Stallion, it might be hard to pull in someone who knows enough to talk about it. (It was surprisingly hard to find a guest who could talk about Half-Life 2, for crying out loud.)
I really like the current state of Retronauts, but the only way for it to be more "thorough" would involve our Patreon making four times what it's doing now so we could make it our full-time jobs. As much as I'd love to explore a fully unknown series from top-to-bottom, I also have a full-time job, and other stuff on the side. But I think even with the more popular topics, we've done a good job of going outside of the obvious discussions. It's also important to point out that new people are finding Retronauts every day, so it's nice for them to be able to zero in on episodes featuring games they know well. After doing episodes on Mario World and a Link to the Past, I noticed our numbers really jumped, so it's clear our audience really likes this kind of content.
The weird thing about Retronauts feedback is how contradictory it is. After posting an episode, I'll see some positive comments roll in, then I'll wake up the next day and see people complaining about the stuff the positive people like. At this point, I think you should just trust that we're trying to make the best show we can, and accept you might not like some episodes as much as others. (Though I still welcome feedback.) Anyhow, thanks for listening!