You should hold on to some of them as, in my experience, the feeling of failure subsides. Many moons ago I worked as a pipe organ builder. I spent a fair deal of time making metal pipes in the pipe shop. The pipes would be finished as much as two years before the actual organ, so were stored for that period. When I finally took them from storage at that later dater, they looked almost perfect. Mistakes, of which there were many obvious to me directly after construction, were forgotten!I think I’m just the opposite. I look at my finished product and am reminded of all the mistakes I’ve made. They stand out like a sore thumb to me. So I give a lot of them away. The recipients will never notice. For me, it’s all about the process and the learning of skills that I am most interested in.