Here's another vote for Connecting Threads. Not only is it great quality for a lower price than poly/cotton from your big box stores but my fussy machine likes it. Also, I love the fact that it has a simple straight spool. The ones they try to make fancy with wide bases, narrow tops etc my fussy machine won't accept half the time because I can't reverse the way the spool rests. My old Singer plods through anything but not the other machine.

I use cotton thread. It does produce lint but I just clean the bobbin case area frequently. I think that because I am so used to working with cotton that I didn't like or wasn't used to the polyester thread; therefore I am just sticking with cotton.

I apologize for the phrase "probably most of us...". I'm pretty sure I was being presumptious.

I use 100 cotton thread from Connecting Threads. Its is $2.49 for 1200yds and comes in a lot of great colors. Both my machines Singer and Brothers like it!!!! Also they have free shipping for orders over $50. I am sure you can find that much stuff you like besides thread. Also this thread seems to last a really long time!!!!!!!!!!!!That said I just used CC poly thread on some charity doll quilts that I just made and it also worked fine and I can not tell the difference except I used over a spool of thread at $4 that a lot of thread and money.

Scissor Queen is so right about the actual cost of thread. I use Connecting Threads 50 wt cotton, Superior's So Fine & Bottom line in the large spools sizes and they are the most economically thread to buy IMO. I have no problem with lint build up because I clean my bobbin case at every bobbin change, my seams come out true, and never problems with them coming apart. They are a better BUY for the BUCK!!

I use cotton, poly and cotton/poly for piecing but try to use the same type throughout. And yes, it is expensive. That's why I hunt for estate sales that have sewing listed in the description. I've purchased huge bags of thread for $5 and it's rare that I've come across brittle thread that needs to be tossed out. As long as it doesn't show through, I use any color at all. I know that's probably a big old taboo, but it's thrifty. Interestingly, at a lot of estate sales, I've seen bits of thread wrapped around cardboard or whatever -- talk about thrifty! Those, sad to say, get tossed.

I use whatever I have. Even an "all purpose" thread is fine for piecing.

I use Presencia long staple Egyptian cotton thread (50 wt). I get it for $1.69/100 meters or $5.99/500 meters. Not too expensive, and it's really good stuff.

I think the Superior Sew Fine comes in 30 and 40 weight also. I love the 50 wt also and use it for FMQ. But I also love Connecting Threads for piecing - it very reasonably priced and I find it to be low lint. I am not sure why some say it is too linty. I have never had a lint problem with it.

As long as it is good quality, I use anything.