I use Sulky, Gutterman, Tanne, Mettler, Aurifil, Wonderfil, Signature,YLI, Superior and older, inherited Coates, Dewhurst, and Semco and some donated Spanish and Greek ones that I don't recognise, but like to sew with. The only ones I do not like are the really cheap, linty sort of ones that keep breaking all of the time. As I am not a purist, I also like a lot of the polyester threads for different purposes as well. One really strong Gutterman thread that I like to use has the word "stark" written on the side. Great for bags and jeans.
The LH bowl in my avatar was sewn with Gutterman, and the RH one was sewn with Wonderfil - just cord and thread, so both gave good results.