I use primarily Gutermann but also Coats & Clark as well as JoAnn Fabrics brand - Americana. The Americana is very thick/heavy and since I normally use Roxanne #11 needles it's sometimes difficult to get that thread through those eyes. These are the brands that are local to me so it's what I use. Color is frequently important to me and as such, I have a hard time with online ordering as I'm never sure if I'm going to get the color I think I am.