I take a very "yes and" approach, which is an old improv rule. It means you don't discount what another writer has written and you don't just write reactively. You acknowledge the other writer's intention and contribute / add to it. Each of us is still in full control of our own characters, however. It's pretty traditional play by post etiquette. No godmoding, no powergaming. If you need to write a specific reaction for another character, always check in with the player first to see if it's okay to do so.
I'd love to find writers who don't just write dialogue in their responses. I want to read the inner workings of my writing partner's character's mind. I love details. I tend to employ a lot of "chekhov's guns" because it's fun to do. Again, it falls back to foreshadowing and building histories. I really want to write with others who value immersive detail.
While my characters are incredibly detailed, I still want to collaborate with other writers and their characters because mutual character development and mutual player contribution is important to me. I don't want to be the only person getting something out of a plot - even if that plot is technically a "personal quest". We can both contribute to cultivating each other's backstories!
A lot of the plotting happens via Discord, to work out initial ideas or just to brainstorm in general. That's all pretty informal and friendly! Once some ideas are hammered out, I'm good to let the nitty gritty happen organically as we write together. For example, I'm a fan of slow burn character romances, because those are adorable. Slow burn rivalries might be interesting too. I love it all.
Posts can be slow at times, due to real life, but they tend to speed up when a plot has writers, including myself, all excited. It's a community of writers though, so you wouldn't necessarily have to wait on just me because you could rp with others in our game too.
I'm pretty open to mature content. My current rp 13+/323, but I've rp'd 18+/333 rpgs prior as well.
If our characters decide to explore some kind of romance, I'm open to writing adult storylines if our narrative takes us there. It'd be a slow burn, for Hana at least, most likely.
My character Hanamene hasn't had a ton of experience with men. Maybe some chaste romances in her youth. Some crushes in her adult life. Pretty tame, either way. So far, anyway.
Magnus definitely got around and probably broke some hearts in his time. He may even have had his own heart broken in return, a time or two.
My characters are both trained fighters who will engage in combat if attacked or warranted. If you write your character as slashing out at one of mine, I often write in my replies that the blow landed - because perfect characters that always evade situations are boring. I like gritty storylines as much as romantic ones.
The typical rule is that while we can attack each other's characters in-game, it's still up to each individual player to decide the outcome over their own characters i.e. how they react or how they're effected. We try to be good sports about it over on the game I play on now, and let some of the hits land or have consequences at times - because that's contributing to the plot! Obviously, no one can full on kill another character without the other player's permission.
I'm not big on writing sexual violence, though. My characters might be sexually adventurous, but I wouldn't be up for outright sexual assault scenes. Just not my thing. Sorry!
Plots I'd Like
I'm playing a Dragon Age play-by-post rpg and have two original characters I'd like to develop further with some key plots, with other original characters as well as canon characters.
Characters from her past, included but not limited to: childhood friends, first/chaste crushes/romances, or general Thornecroft-family acquaintances (from Southern Ferelden area like Redcliffe, Hinterlands, Lothering, Honnleath, etc.). We can work out the details of how they knew each other, but those are the main starting points where Hana is concerned.
Discovering who killed her father in the Mage-Templar War.
Life-at-the-Circle threads, specific to Kinloch Hold pre-Fifth Blight. Hana was a templar prodigy.
The game could really use a Cullen Rutherford as well, if anyone is willing to play him.
Hana's a deserter of the Templar Order, and currently has to get her lyrium from less reputable sources - so that's an ongoing subplot, and a possible way for characters to connect.
Romance threads in general. Hana had a sheltered upbringing so it'd be fun to see her come out of her shell. Plus, rom plots are always fun. Even love triangles. Why not!?
Characters from his past, plots might include: childhood friends (mostly all highwaymen and criminals), former flames (he got around), former rivals (he was also a former pugilist so it's possible they were professional rivals and not personal ones, too), former and current employers.
Magnus is a gambler and has numerous unpaid debts, so it's possible for our character to connect that way as well.
It's possible he's wanted for various crimes, given that he was a bandit prior to becoming a pugilist also.
There's opportunity for someone to play his first love i.e. the "one that got away", and broke his heart, too.
Some of my Mod-work, populating my RPG's boards with NPC chatter: here & here.
Some of my in-character writing as my OC Hanamene on another RPG - here & here.