It's probably because you have so much going on. If you keep looking around, you may find something you really want to work on. That happened to me. I went several years, starting one quilt project and losing interest and then starting another and losing interest. Then I came across a BOM that I really loved and now, I am almost ready to put on the binding! I also worked on a smaller quilt in the middle of this and now I have my next 5 projects ready to go. I have found that I have stopped doing my other crafts so I guess right now, I just need to quilt.