Ditto what she said. A lot of it is in the look you want. Just practice with it. I've used DMC but only a strand or 2. No problems.
Originally Posted by
PaperPrincess
Sounds like the lady who is teaching you is a member of the quilt police force. You can use whatever you'd like, just keep in mind that the heavier the thread the more the stitches will show. This, however, is a design choice. The only other issue is that if you use floss, it sometimes runs, so do a few stitches on a sample & run it thru the wash.