I am melancholic/phlegmatic so I am normally low-key as well as being an introvert. Having someone who is always wanting to be active or who is reacting excitably to situations would put my nerves on edge.
So, my response is: yes! I do appreciate someone who presents a calm demeanor.
The Calming of a Storm at Sea. On that day, as evening drew on, he said to them, Let us cross to the other side.Leaving the crowd, they took him with them in the boat just as he was. And other boats were with him. A violent squall came up and waves were breaking over the boat, so that it was already filling up. Jesus was in the stern, asleep on a cushion. They woke him and said to him, Teacher, do you not care that we are perishing? He woke up, rebuked the wind, and said to the sea, Quiet! Be still!The wind ceased and there was great calm. Then he asked them, Why are you terrified? Do you not yet have faith? They were filled with great awe and said to one another, Who then is this whom even wind and sea obey? Mark 4:35-41
Calm, the "right kind" of calm is very nice so that when I get us lost for the (insert medium number here) he will take a deep breath and smile yet he is still capable of being appropriately upset without going overboard. We all get upset but if a guy is so calm that he feels he needs to suppress every time he is upset that would be scary for me.