My reasons are:

I can wear sweats
Be here for my child
Nap (that's #1)
Curl up in my chair when I don't feel good
Not having to drive to work
Having my house clean during the week, and my family's supper cooked and ready
Putting my hair up in a pony tail and not worrying about make up
Sitting on my deck in the summer, with a Coke, while I watch the kids play...maybe that should be #1!