I recommend that one really makes an effort in ensuring roleplays have credible characters, behavior, and plot development, as it really helps in getting fully immersed in the experience and making the most out of it.
In terms of visually, making use of a chair, desk, and other pieces of furniture other than the bed can help as well as the use of Outfits for Roleplays.
Characters should stay serious, unless being deliberately cheerful, such as a sadist laughing at the bottom’s pain. Accents can also add to the intended erotic theater expression. Having stereotypical, but still with personality, chararcters in their manner of speech, habits and behaviors, possible sexual motivations, etc.
For details regarding plot and character motivation in the play see Character in Roleplays Here I share some additional details and examples to aid the credibility factor.
BDSM Roleplays are easily initiated by an authority figure confronting the subordinate on some transgression that was caused by her sexual impulsivity.
In general, actions from the top shoud be usuallly calm and deliberate, with occasional bursts of passionate activity.
Subs can physically act losing obstinacy by holding then relaxing tension and changing the timbre of the voice, in a dynamic arc of being steadily worn down in brattiness.
With vanilla roleplays one should make a greater effort to decide on a character with personality, in demeanor, level of sexual assertiveness or reticence, and flirting style. The credibility adds proper erottic drama, and gets one immersed in what would otherwise be a cheesy steamy encounter trope
It can be fun to script out longer scenes, and add plot arcs, such as someone slowly submitting to sexual advances, a change in location and activity, etc.
Keep steady dialogue, and continue to stay in character while having sex. The dirty talk can be a retelling of the events up to that point, highlighting the active party’s motivation.
In the beginning imagine that there is a moment wherein you are leaving your own identity and becoming the character in the roleplay.. A swift movement, such as standing up or turning, can accompany this, as well as an overall change of energy and vibe as you method act the character. Do not revert, do not consider yourself as anyone but the roleplay character until the end. If the end involves heavy stimulation, it may be good to go immediately to all out aftercare. But otherwise try to stay in character in flirting during the pillow talk after.