At first I couldn't explain this new pattern of my repeated visits to eBay in search of black backpacks. I had bought several. Some made me reasonably happy. Some furthered the learning curve down "What I Don't Want Street". Going down that road helped me to discover my preference for backpacks with lots of obvious and accessible compartments. Then I realized that since I was travelling for work more than I ever had before and since I am a Taurus, (a home centered sign), a backpack has become an extension of home to me. Compartments are rooms. A central compartment that is able to hold my massive planner equals a large family room. An area with loops to hold pens and pencils plus a notebook is the office. No matter the size, it sure is easier to clean.