I often think about potential longevity when making my jewelry. And am glad I held on to a few pieces made early in my career. Here is a sterling silver necklace completed in the late 70's that I still like to wear sometimes today:
Simple clean lines can help a piece to be considered more classic in style. Perhaps for me, it is only a personal attachment. You can draw your own conclusions.
Second up is a bracelet I also made around the same time. This piece I love for the bezel work though I have not found a reason to wear it for quite some time...