I buy Aurafil on sale and like it so much better than CT even though my machine isn't fussy it's just nicer.

I am of the old school and use silk wrapped Mettler.

I use the same threads I quilt with... mostly A&E Permacore tex 40.

This is me, too. Aurifil is much thinner than CT so it sinks into the seam better for more accurate piecing. Plus it's much less linty than CT thread so I can sew much longer before I have to clean out my machine. And as a bonus...since it is so much thinner, a LOT more fits on the bobbin!

I do like CT thread, though, and often use it for my quilting or decorative stitches. There the thicker CT thread is better because it stays more visible, and while it's lintier than Aurifil it's nothing my machine can't handle. Plus with CT thread prices I can afford to keep a whole rainbow of colors on hand.

I use Superior So Fine #50, for piecing and quilting. Depending upon the fabric color, I usually use natural or a shade of gray (have light, medium, and dark). I buy it by the small cones.

If I'm top-stitching something, I'll use whatever color looks best, regardless of brand. My machine doesn't seem to care what I use; it's apparently happy with all threads. :)

For piecing I use the Connecting Threads.

FOr quilting (I don't have a longarm) I use CT also, but on
my last project (a doll quilt) I used my Floriani embroidery
thread because it has a wonderful sheen to it, I also used
it for my applique stitching on the same project.

LOVED how well it worked for me. I will be doing that again.

I use connecting threads.

Same here. Usually from Connecting Threads or whatever is still good from my days of sewing clothes for my daughters.

Aurifil 50 weight. Just a few colors, grey, camel, white and black, and you can piece anything. It's very fine, so your seams are flatter and more fits on the bobbin. Love it.