I use a lot of Gutermann Mara 100, as I have a collection of it for garment sewing and it's my preferred thread for that (I can always find a color to match for top-stitching). I use it for piecing nearly exclusively, too. It's a little thin for quilting, but if I want the quilting to fade away it's great.
If I want to show off my quilting, I have been using Superior Thread's King Tut. I love the variegated look, especially with decorative stitches!
I have some Coats & Clark Dual Duty XP thread from over a decade ago. My Singer HD4432 hated it! My Janome MC7600p seems fine with it, though. I got out of the habit of using it, though, so I mainly pull it out for patching garments.