I had a partner like that one time, where we could talk about a lot of stuff OOC. It definitely helped. I think we were on-and-off for about a year, which is a long time for me. I think you're definitely on to something there.
(& also she dragged me into a new fandom every couple of weeks, so...
Roleplay used to be my #1 recreational activity, but the older I get the harder it is for me. I've always struggled to do anything long-term (adhd as fuck).
Every so often I get a craving to get back into it, and I'll have a lot of fun for a month or so, but then I get bored/overwhelmed and end...
...and very out of practice.
I write mostly m//, f//, or gen. Very lazy lit. I prefer working in the 1-2 paragraph range, but I might write quite a bit more depending on circumstances. I'm unlikely to reply more than once a day due to being a pathetically slow writer.
I love fantasy, sci-fi...