It was interesting to see that your preferences seemed to be evenly spread between the three possible choices.
Number two was actually the first arrangement I tried out. But I had wanted something where the colours flowed into each other and with the bright red diagonal in particular I felt that this was breaking up into triangles.
So I tried again. This I felt gave that sense of flow I wanted and I think that was what Nanacathy saw.
Having realised that there were only three totally different arrangements if I kept the basic pattern and colour order, I laid out the last arrangement which was given as the first of the three. This, to my mind, very much dived the shape into squares. A red-orange square, a yellow-green square, a greeny-blue square and a dark blue-purple square.
This made me certain that I would use the pattern shown as three in my arrangement. The squares, the triangles and my chosen one.
All attractive in their own way.
I have joined the squares and will show you them next week and maybe the finished cushion if I have got that far. It seemed too much to add to this post.