well, in elementary school we had recess. i miss that. :(
I miss preschool!
the feeling of being in love (even though I wasn't)
There are things that I miss about all of them. But I'd definitely say I miss elementary the most. Those were just the most carefree and stress-free years.
Junior High School!
I'm still at high school, and never did middle school. Elementary school, I spent most of in the same class, and I hated them and loved them at the same time.