I fall into the multiple project group. Not necessarily by choice. I belong to a guild and there are projects from time to time. They get started and put on hold until near due date because projects for a boutique group become more pressing. Then, a family event needs a quilt. They usually get done on time but it does get to be a juggling act sometimes. Also, there are the energy limits to contend with. I have great energy in the morning but it goes away through the day and I tend to not be very productive come evening.