I followed the streams quite regularly for a while, however I haven't been caught up for quite a while now. The main issue, in my case, was time management. While I did enjoy catching the streams, the issue that came up for me is that I got to a point where I needed to cut back the time I was spending on streams and the like, and because of that, I ended up almost solely focusing on youtube, due to its speed controls (since, at 2x speed, I could watch a decent amount of content, without cutting too deeply into the time I needed to spend on other things), so I would keep up with podcasts and RPG streams, but it meant I couldn't catch things live or regular video game streams. Unfortunately, I don't know what value this answer has to the question at hand, but I thought it might be of some use at least.
As far as the other questions, since I do enjoy the streams, I would like to watch them again (though, admittedly, I would probably be less active than other potential responders). Hitbox is probably preferable to Twitch, if VODs are captured (while I would like to watch live, often times, if I miss a stream of a longer game, like Fallout or Skyrim, or whatever is popular nowadays, it makes it harder to watch future streams, not knowing what I missed). I am unsure if anything has changed since I last was active, but Hitbox seemed to have a shorter delay, and fewer 'hiccups' as far as streams went.
For games, I'm not entirely sure. I tend to enjoy longer games, but they are easier for me to fall behind on. I have the same likes and dislikes watching MMOs as when I play them: a lot of the time (the good ones at least) they can be fun to go through once, but it's hard to stay invested on future playthroughs, after having seen the quests and the like (for which oddly enough, I don't have an issue with games like Fallout or the like; I think it's something to do with the way quests are different between the styles of game). And games like Binding of Isaac are probably the easiest to watch, since there's no overarching story, that makes me feel like I need to keep up with every stream, but it's also a game style that I think is best with multiple people on stream, which made it always a good post-RPG session game. I can't say I have a clear answer, as far as the games on the steam library, but hopefully this is worth something.
As for times, Evening, starting after 5-6pm EST is probably best.
I don't know how much help this is, since a lot of my issues don't really come down to the streaming service, or games or times, but just the amount of time in general, but I hope this helps at least somewhat, since I do want to get back into watching your streams, if I can afford the time.