"Do you prefer to stitch on a rotation or one project at a time?"
Well, I have to say that it varies with me. If I am working on a small-to-medium sized piece, I prefer to stick with it until it is finished. However, in the past few years, I have been stitching massive BAPs (the Ink Circles original "Roll Your Own" series and Elizabeth Almond's blackwork sampler the most recent examples) and I find that I preferred rotation with those.
Since "Roll Your Own" is no complete, I have no excuses for one at a time but... given my injuries to my left hand over the past three years, stitching one at a time on smaller pieces seems more likely in my future, especially since I don't seem to be able to put in the time necessary to make much visible progress on the BAPs. And I find that visible progress is now what motivates me.
As for my stitchery progress this past month. Again, sadly nil, zip, nada, none! I have spent the past two months in occupational therapy, getting my thumb to a workable state again. My final (I hope) visit to the surgeon is November 5 and I hope that he agrees with the therapist that I have reached my goals and no more therapy is warranted (although I suspect hand exercises are on my daily routine from now on as there is still pain in my hand when I make certain movements with the thumb, and that pesky thumb isn't nearly as flexible on my left hand as the one on my right hand...)