Well, I have more UFOs than know what to do with, but I can't blame sandwiching, basting or quilting because I take my completed tops (with pieced backs) to a long armer.
My excuse is a short attention span and the glitter of the new. Why keep working on the same old project when there are so many other patterns/techniques/colors to explore? I am guilty, but feel no guilt (quilt guilt?) This is my hobby and I make the rules! (Actually, there are no rules.)