The best RP of mine was a 1x1 in a larger game. 

The girl and her character had done a random open of her running naked in a park fountain (she lost a bet), and I replied with mine. They instantly cliqued, so unbelievably friggin well, I can’t even describe it – I’m sure peeps know what I mean. They were immediately magnetized to one another, interacting seamlessly in a flirtatious, classed kind of way and oh man. Oh man. The character herself was beautifully built and handled by one of the most creative and eloquent writers I’ve had the pleasure of threading with. Besides that, she was just a perfect match for my guy, and he was for her. We threaded them a bunch of times, playing on different scenarios and settings, and on every occasion, they were fluid and great to write. OOC wise, she and I didn’t have to brainstorm much or anything, soon as the characters were together, they synced and flew. It was one of those when you religiously check your phone when not at the computer, waiting for a reply…and when you get it, you immediately start planning your response. It was just a really tangy, enjoyable and challenging relationship.