I was impressed by your ability to produce a large number of renderings at one time, but some negative points are obvious:
1) In some pictures, the limbs of the characters falling through the floor - this is very bad, it needs to be carefully monitored and spend considerable time on it.
2) You need to watch out for gravity, especially the effect of gravity on the chest and on the hair... when a woman is in the position of the head down, and the hair and breasts are directed up - it just looks bad. Personally, I didn't like it the most... This should also be monitored and spent a lot of time on it.
3) the cock in your pictures is just an unfinished blank... you just inserted it without any settings and it looks very bad, you need to customize it - add texture and detail the surface. It's not difficult, but it takes time.
4) ... and of course the quality on scenes with low light - it just makes no sense to stop the rendering process when it has not passed at least 75%... - this flaw has already been said a lot here...
5) Summary: I wish you not to dwell on the achieved quantitative performance, but to improve the quality of the scenes.
My first render series. I think it is first and so amateur
But ı am studying for quality render and settings
Thank you all. Thank for helps...