What I didn't way before (which was more focused on temps):
The box pleat kilts are more balanced from to back than the other styles (which tend to vary more on material, material weight, and where they hang.

In a box pleat, half the material is in the front and half is in the back. The box pleating works somewhat like a mild anchor, as the under cut of one pleat pulls AGAINST the one next to it (the "swish" of a knife pleat is the same action that allows fairly easy wind expansion, as it expands like an accordian).

I could go on and on, but there are MANY threads on the advantages of box pleats vs. advantages of knife pleats.

I just like how box pleats "feel" when worn.