HoneyJ

Hi all! Can you please help this newbie and school me about thread! Currently I am using Aurifil 50/2 cotton for piecing and quilting. I like it. I like it because I have no problems while using it. I honestly don't know the difference in using cotton over poly or why I should choose one over the other.

I've been lucky enough to come across a used Baby Lock LA. It came with some cones. I'm not sure what would be the best thread to use on the LA. I was looking into Superior Threads So Fine which I see is polyester.

Any suggestions?? Is it ok to use poly on cotton fabric? Is it ok to piece with cotton but quilt with poly?
Please share what I should know about Thread. Please share your favorite and why.

Thank you!