I still do not know, which knot do you mean with “Man rope knot”. There are several. The #847 is (a lot to) bulky.
The #683 is nice, yes.
But it seems it is quite difficult to form it nicely.
And to be honest, I prefer the appearance of the #693 (Diamond Knot) - which is difficult to form as well.
I mentioned the “thistle knot” with the hope, there will be some comments on it.
I still do not know how it is to bind. But I suppose it is a combination of one crown and one following wall.
That combination looks as nice as the #693, is easier to bind and the outcoming strands are more closely together.
In shibari the end knots have two functions: Prevention of unravelling and stopping a joined rope.
(When I find a picture of this type of join, I will post it.)
Mainly it is my personal esthetic decision.
But it seems that - as well - in traditionel shibari they will never use whippings.
And yes, I like the tasselled look of the strands (2cm) behind a terminal knot.