There's a woman in my Guild who says she has just one project going at a time -- she works it till it is done & only then will she begin something new. No UFOs in her house! How smart, but, to my way of thinking, just a bit dull.
Me, I love having several projects at different stages of completion -- when I tire of cutting, I piece a while; weary of piecing, try some quilting; bored with quilting, maybe sketch for a bit. I have the luxury of having more than one machine, so all this jumping around is a bit easier. (But I have to be mindful of which machine is piecing what project -- I've found that not all quarter-inch machine feet are created equal!)
Maybe because the weather is so miserable (see my previous post), maybe because I'm finally getting over my focus-less funk, I'm not sure the reason, but right now I have an especial LOT of projects going: 2 gift quilts & a 3rd I'm thinking about, the Tower of Owls, 2 other projects with Stash Creatures to be revealed later, a simple tessellating block with an old jelly roll, a 16-patch using double knit scraps, a re-make of an old quilt, & a percolating idea that may be ready to begin.
Phew! A bit excessive even by my standards.