As a teacher I love back to school. It means that I get stand up before my kids and bore them, impose on them, and glare them into submission . . . .
No in reality I like back to school. I teach at a year round elementary (sixth grade) and I find that after 3 weeks off, I am ready to be busy again. Guess that comes from being in business for 15 years and not having a lot of time off anyway; that and combine with my type A drive.
I look forward to welcoming my new students and having them engage in learning. I love the fact that I have 1 computer for every 2 kids and a ton of bells and whistles that support my teaching efforts. More than anything I like watching the kids build a portfolio where they get to save their best work that shows their growth and learning.
As far as boring, there is a major drive in education now that students with support/scaffolding from teachers, should really direct more and more of their own learning. Harder to do, but much more rewarding as kids really engage in learning at that point.