Even if you don't need it specifically for your job or school? Do you keep it with you just because it is so portable? I've been using it mainly as a desktop at home but the portability is great if I am visiting a relative and want my computer with me. But my question is more for the people that I see using it at Starbucks or on the subway. I am contemplating getting a messenger bag for my MacBook Air and keeping it with me wherever I go.