Hello! welcome to my request, before we get to what you're looking for let's go over a couple of rules 

first off i like to get t know my partners, helps me write and really give life to my characters. next, each message must be at least a paragraph long. portraying sex scenes i usually write them out but if you prefer to fade to black we can do that. 

Now onto my pairing ideas, below this list will be lists of fandoms i would like to do as well and a short list of AUs and such i enjoy adding (all can be MxM or MxF

Mafia member(or boss) x Cop
Serial killer x writer
pen pal (bully/ wants to hurt person B) x pen pal (I have a plot idea in mind for this one)
downed angel x human
Sideshow performer x audience member

fandoms-
detroit: become human
hetalia
doctor who
sherlock 
ouran high school host club
my hero academia
Marvel
Love pistols

And more. Just ask I can't think of everything at the moment. I also have pairings in mind but also open to OCs 

Extras I like to add
Omegaverse, shapeshifting, fantasy in general, pregnancy (later on, I think it's cute)