Thanks so much for the kind comments!
"very nice with the triangle effect... did you find it difficult??"
Nope, not at all -- in fact the material I was using did not lend itself to rectangles (at least not small ones). And in the layout I chose, all the triangles are sewn hypotenuse-to-hypotenuse to make a square -- after that, it was just sewing squares to squares! Very easy.
"why didn't you like machine quilting?"
It's just too hard to control where the stitches are going. I did stitch-in-the-ditch, in addition to the other stitches, and it kept wiggling around. If it had been done by hand, it would've been totally trivial to stay in the ditch. Maybe it just means I'm not that great with a sewing machine