I'd say the "squirrel syndrome" is my main problem too -
I own an LA, so don't really consider my floppies as UFO's. they're just waiting in line to be quilted. Though some have been in line a long time and keep getting bumped back.
I love the design phase, and sewing blocks to see how it's going to look with the colors I've selected, but once i get it far enough along so I've got that figured out, I often start loosing interest and it becomes tedious and I want a different challenge. I have way too many totes with with sets of blocks that need to be sashed and assembled, and that part I don't find "fun" so they sit.