I only have one quilt working at a time . . . I may have many planned and even have fabric ready to go . . . but I only work on one at a time because otherwise I might not finish. I do, sometimes, have another kind of project in the works - currently I also have an afghan I'm working on because DD wants it and it's easy to crochet blocks for it while riding the bus home from work.
When I was much younger (back around the time of the dinosaurs), I would start lots of projects and seldom finish any of them. So now I try to finish anything I start. I ain't necessarily fast, but I get there in the end. :lol: