Damn, I was going to post on here but then you say the exact thing that I was craving XD.Oh there are so many types of roleplays I would love to do, but haven't been able to yet. If I had to name a couple ideas.....
1. Anything involving dinosaurs, or creatures from prehistoric times. I am a huge paleontology nerd, so when I see stuff related to it in an rp setting, I get excited. An rp set in the world of the Fossil Fighters game series I could see myself having a lot of fun with. I also find gijinkas very cool, which a dinosaur gijinka (basically nonhuman beings/things portrayed as humans) roleplay I would definitely be down for. A time-travel survival roleplay could also be neat. Maybe a group of people start off in some sort of corrupt sci-fi dystopia, and end up traveling in time back to the Mesozoic Era, and they have to survive in this new environment. Also, I remember once joining an rp that had these dinosaur people in a medieval setting, with this huge conflict between the herbivores and carnivores within the kingdoms, and man I was excited. Sadly, that rp never got off the ground.
2. A roleplay based on the Backrooms. For those who don't know, the Backrooms is a concept that the real world is known as "the Frontrooms", and that one can no-clip into another liminal space-like reality known as "the Backrooms". Here's the image that spawned all the popularity:
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Someone then made a creepypasta based on this, and the concept has gotten very popular as of late, with people coming up with all sorts of different levels and rooms, or different entities that inhabit the Backrooms; it's kind of like SCP, but based on locations. I think this has potential for being a cool concept for a exploration/horror type of rp. Maybe a group gets trapped in the Backrooms for some unknown reason, and they're trying to find a way out. Another idea could be them learning to cope or accept their fate in the Backrooms, leading to a pervasive feeling of dread as they go about trying to survive in such a place.