Yes, it's the curse that's built into your workshop. Having fabricated and designed props professionally for many years, I was always slammed under heavy deadlines and hobbled by budget - so the personal projects often seem like a kind of rebellion against decades of restrictions and meddling by higher-ups with questionable talent.
Leaving something unfinished or nearly finished until I'm ready to get back to it or until I have the exactly perfect parts feels like such a luxury that I've trained myself to appreciate that indulgence.
I don't always follow my own advice, but think I've also learned that there is honor is abandoning a personal project at a certain point. Similar to the epiphany I had years ago when I realized that it's okay to stop reading a book if it's not delivering what I want. I would often finish reading books simply because I felt like I was wasting the few bucks I'd spent on it if I didn't finish it - or that I was wasting the investment of effort I'd put into starting it. But then it occurred to me that the TIME I was wasting has so much more value. Finishing something because you feel you "should" isn't as enjoyable as working on a project you're really excited about.
Look at your "to do" list and focus on the one that lets you use your favorite tools or the skills that you're the most confident with.
A feeling of being so overwhelmed that you get nothing done isn't why you do what you do. Like with the book metaphor, if you're reading a book you're not really enjoying, you don't get that great feeling of being excited about picking it up again - you lose the whole point of it. And it takes forever to get to the end. You're counting pages, hoping it gets better. Time much better spent reading something excellent.
If a book - or a building project isn't providing the necessary elements of what you enjoy about it - the the whole reason you were drawn to it in the first place - then sometimes the most efficient and productive thing you can do is to accept that certain projects simply aren't going to be completed. And it's okay.
