Since you don't like the bulk of a quilt, maybe you would prefer what is called a summer quilt - just a top and a backing sewn together around the edges and either tied or tacked at specified areas around the quilt (top) to hold the pieces together. Or if only plan to hang them and never use them, you could just sew the edges (edges folded over and stitched) to give it a finished look. Or, there is nothing wrong with just hanging as they are now. it's how you are happy with them. No judgments here! They are your quilt tops to do with as you please!
wolfkitty