I have always felt that the selvedges have a different "feel" to them than the rest of the fabric. I only cut off what it takes to remove the selvedge. I use them in projects and am in the process of trying to collect enough for a tote bag. I love seeing the different projects that are done with them. I have gotten charm square that still have the selvedges on them and do not use them but cut them down. Usually the swap is pretty clear about making sure the selvedges are cut off before sending the squares. Happy quilting.