I suspect most of us quilt our own quilts, and most of those are NOT FMQ! I have a curved line that I like to use. Sometimes I do a cross hatch, sometimes shadow (never the ditch, that's too hard). The last one I tried I didn't want to interfere with the design of the quilt (and it was 2 sided) was a mocking of the ties that my mother used to do... It was a lot of 5" scrapy squares (mocking some microscope photos) and I started in the center of the a four corner and went 5 stitches out and then 10 back and 5 forward, all in a straight line; then turned my fabric 90 degrees and repeated it, so that every corner had a very good anchor. Later my 15 year old g-son was making a quilt for his "other" grandfather who is wheelchair bound and the design was unique and 2 sided. We dithered around trying to figure out how to quilt it and he decided he wanted to use the "X" on his quilt. It allowed him to fudge a bit here and there a pinch so that the X never cut into the pattern in an awkward place.
My all time favorite has been a long undulating line for which I made a template. I found the link shared by easy peasy outstanding! It opens doors for me! Thanks Eesy Peesy!