My sister and I are finishing some of my Mom's UFOs. I see why they were neglected - mostly poor cutting, a phase I have been through - but decided to ignore the imperfections as much as possible and finish them up. One is done and gets compliments from those who see it, another is pieced, but lap size, much smaller than the original intention. It's cute, but far from perfect. However, one of her grandkids will treasure it.
Perhaps the secret is getting yourself motivated? Pick one of your UFOs and decide who will get it. It can be a charity project, but motivate yourself by imagining someone loving it to tatters. That's motivation!
I also like the idea of choosing the one that needs the least work to finish it, and finishing it.