For me, the thread usually depends on what I am doing. However I do use Coats & Clark Star Merch thread pretty consistantly. I also use Robison Anton Rayon Machine Embroidery thread if I want to bring out a design or just want it a little fancy. I seldom use the same thread for a whole quilt. I'm currently quilting an embroidery quilt and used RA Rayon for the feathers, and Star Merch for SITD and stippling. Then in one of the borders I followed the grid lines that were in the fabric and used RA Rayon for that. I almost always use Star Merch or Signature in the bobbin. Signature works great and is less linty than Star Merch, but sometimes the selection of colors at my LQS isn't the best. I love quilting with my Juki, do you have yours on a frame or table? Mine is on a table, I made one of those cheap quilt tables and really really love it.