Different kinds of thread are good in different ways. After seeing Bob the Thread Guy's demo back in the 200 series I have taken the stance that as long as the thread is of good quality (not elcheapo Wally World or no name brand
) then I just use whatever I think will give me the look and or feel I want in the project. Poly and Rayon both are known for giving bright color and sheen that can really make thread painting and embroidery pop! Absolutly nothing wrong with using them, so don't you dare let those quilt police scare you away.
I did buy Gutermman poly thread when I was doing my daughter's First Communion gown because I wanted something matching fiber content just in case something went amiss. I had no problems with it and in fact have thought about using it for peicing because it was strong but somewhat more fine than my regular cotton I use. For most of my peicing I use Connecting Threads Essential 100% Egyptian cotton satin finish thread. It is relatively inexpensive when ordered through their website, can be bought in a wide range of colors, and it so far appears to be pretty good quality. Very low lint. I also use Coats and Clark from time to time, but have found on occation that it is linty, but I like their hand quilting thread. For machine quilting though - anything goes
I have used everything from cotton to Ricky Tims Razzle Dazzle. Have fun and no fear.