In the three photos the kilt is at three different heights - the first - for a chap with a bit of shall we say - gravitas, I think is fine - but by the third photo it is too long.

I think it is a matter of proportions and where the hem cuts across the leg.

Wearing a shorter than mid knee length is good for the more slender figure, but when the impression is of rather shorter than wide it begins to look wrong - at least to me.

Mid knee is a classic skirt length as it is the most flattering for all figure types- if you have noticed the flower presenters at the Olympic medal ceremonies, in the dark blue suits, their hemlines are mid knee.

Some might think that irrelevant but the general arangement of two legs sticking out from a tube of fabric is a pretty fundamental similarity.