Good AI roleplay is mostly about what you give the model to work with. These habits make scenes sharper and stop conversations from circling.
Start FreeSay where you are, who is present and what the mood is. Concrete sensory detail gives the model something to build on and anchors the generated art.
If replies start repeating, change the environment or add a complication: a noise, an interruption, a decision with a cost. New constraints force a new response.
Long enough to give the model something to react to, short enough to keep the pace. Two or three sentences usually works.
Usually a thin scene or a memory limit. Change the setting or introduce a complication to break the pattern.