How emotional is a Gemini?

So, let's delve into the enigmatic world of Geminis and their emotional landscape. How deeply do they feel, and how do they express those emotions? Are they prone to mood swings, or do they maintain a steady emotional equilibrium? Are they more in tune with their own feelings, or do they often struggle to understand them? As a curious observer, I find myself intrigued by the question: How emotional is a Gemini, really?