I prefer thin thread for top and bobbin. I use Superior, Aurifil, Connecting Threads poly on the cone (its's 70 wt), Wonderfil, Sulky, Guttermann, Mettler, Presencia, Robison-Anton, Coats&Clark bobbin thread and any other name brand thread that catches my fancy at the time. I have a Bernina, Janome, Singer and Brother machines and non are finicky about thread. I use Glide for machine quilting and fmq.