I'm going to keep this pretty plain and simple and my partner and I can build up the rp plot together as we discuss. I'm hoping for a roleplay with a merperson(s) as the main character. This could either be a merperson x human pairing (preferably modern unless you just have a really good plot otherwise) or a merman x mermaid (I do have a somewhat plot for this one, a sort of star crossed lovers plot with merpeople from different areas of the ocean (Surfacers who live close to coral reefs and have no issues with humans and saving them now and again (thus the human's source of mermaid myths) and the Deep Dwellers who tend to stay in the deeper and darker waters (think bioluminescent merperson tails) and can't stand humans (I'm thinking these are the source for humans myths of Sirens). 

Or if there's more than one couple we play as, we could mix the two pairing ideas together with the two species of merpeople and humans involved. We can discuss it as we plan. Just shoot me a pm if you're interested.