I think it's safe to say we all want to complete every story we've ever put an extensive amount of time into so...
How many stories do you have on deck to complete? Fully drafted or otherwise.
How many do you work on at the same time? This can be at any stage of working.
How many do you think you'll actually complete before you kick the bucket?
For me:
1: I've got three major stories and a few half formed ideas that I'd like to do.
2: Over the last 4 years, I've worked on my main project and a one-shot pretty consistency flipping back and forth between the two up until last year. Then I started working solely on my main comic as we are coming to the end. Now I'm working on the main comic and pre-production for my next long comic.
3: The reality is, I'll probably get two of my major stories done and that's about it unless I experience some major changes in my life situation. Fingers crossed for a miracle! LMAO!