First - the only dumb question is the one that is never asked! Then, I think the only time the thread (or fabric) is an issue is if you were submitting your quilt to a super fancy quilting judge! I believe that whatever you choose to use to make your quilt is ok. Maybe the fabrics are different, maybe the thread is different, maybe the colors aren't everyone's cup of tea - but it is your choice. There is nothing harder and more of a drudge than working on something you don't like.