When writing a story there are several stages before you can call it a finished product. The first stage is often brainstorming about the concept and then coming up with the general idea what the story will be about and what it leads up to.
Then there is the first draft, where you’ll find out if the story resonates with you or not. My rule of thumb is: if I cannot blast through the first draft, or if I get stuck more often than I feel necessary, then I abandon that story because I don’t think it’s worth the effort.