I have definitely felt that way too. Does everyone feel that way about their stories? I mean, obviously, we write what we like... and hopefully we like what we write. I have written stories that I know I probably wouldn't click on if someone else had written them, but most of them are right up my alley as a reader.
I think it depends on the story for me? I've definitely read and reread whatever I've had written for PBox and Gobosei over the years, whether while I was writing or when I was hoping for new inspiration. I'd always had those two saved in a non-internet dependent accessible form since about 2008 and then moved to google drive for both online and offline mode around... 2011/2012 sounds right since that's about when I had a Galaxy S3. Plus the beginnings of both PNecklace and Pandora's Legend (that prequel type story I'd mentioned, yes it does already exist and have a name) whenever I started attempting to write them... 2015 sounds right? Right around Nick on DWTS? And I'll admit, I get sucked in every time even though I know what's coming. Other than not being surprised, the only major difference is probably that I can read them quicker than most other people because I know what's coming (and because I usually skip reading the NSYNC chapters, but summarize them in my head for the sake of the story), unless there's anyone else out there who has read them hundreds of times.
There's others, though, that I didn't reread until you and Mare recommended I save anything I wanted to keep since the site had been going down. And I reread almost everything I had posted when I saved them (I honestly didn't reread or save my very old stories because I know where they are if I really want to rescue them from my first computer's hard drive; same with my poems from college, I know where they are.) Beta Sigma Beta, for instance, I hadn't reread in years. And I laughed a couple of times and vaguely remembered everything I'd had planned for it, but I also saw it as "a snapshot into my life circa 2008-2009" and had no pang to finish it. I probably would have read it at the time if someone else had written it, but I don't know that I would now.
It was whatever was already up. I just added the link that already existed to my story page and announced it. So anyone who wasn't already reading it on the Yahoo Group had like 50 chapters to catch up on. But that turned out to be only a quarter of the whole story LOL.
And I was worried about catching up on 19 chapters! 50 seems like a lot. That's kind of how I'm feeling about If I Knew Then. It just seems kind of daunting, haha.