Why do I get that look when I say I want to teach middle school?

I get it- middle school students have raging hormones, their parents suddenly become less accessible when it comes to their child’s education, and they become inconsistent with their maturity levels.

But why do I have so much fun with that age group? They keep me on my toes, present a wide range of challenges, and at the end of the day I feel drained but satisfied. I haven’t had the chance to teach in a classroom with over 15 students so am I missing something crucial here? Is it less satisfying as their numbers increase?