I've noticed in the 1 on 1 checks, there's quite a few more people willing to do Military roleplays of one type or another, including myself. I see medieval and the occasional WWII, and more often than not a sci-fi themed one. I've been personally developing my own sci-fi universe, with a highly militarized society.

I've wanted to throw it out there and get some critique, and maybe get a roleplay started in it, but I'm not huge on large-group roleplays. Small groups I've done once or twice, but I'm typically 1 on 1.

I'm a former soldier myself (shoutout to the Ohio National Guard), so I know more than your average person would. I've used my knowledge to think of the mentality a soldier has, to think of what war is like, and think of every factor that plays into military roleplays. I think a lot of the problem with the dwindling interest in military roleplays is the fact that they take a large amount of effort (a lot more that your typical werewolves and vampires). If they're historical, you have to do research so it's not horribly inaccurate (I've roleplayed with people who refuse to do research themselves). If it's sci-fi, you have to make your own world, or use a pre-existing one. And with the pre-existing, you'd have to know/research what the universe is like. It takes a lot of thought, and I feel that military roleplays are very mental. Soldiers are unique. You have to get into that mentality for your character/characters.

Genres like fantasy and slice of life are just easier, in my humble opinion, to create and sustain than militaristic roleplays.

But that's all just my opinion.