Well for me, I'm OK with unfinished story ideas.
Some stories are just going to couple of sketches and notes made for yourself. You expand on whatever the story ideas as you like, and then stop when you feel done (for now). If you feel like working in the future, you can revisit your old story ideas.
Sometimes the ideas are just free-floating characters I like. No story, no plot. I just like them.
Not everything needs to be completed.