Balance

I wonder if balance doesn't just mean balance of time or tasks or energy but also balance of emotions.

Being as enthusiastic when you are motived as when you are not.
Being as appreciative for the luxury car you drive as for the economy flight you fly.
Being as excited about a lazy day as a super productive one.

Isn't the end goal of "balance" to keep us calm, emotionally regulated and content?

Well, what is more fulfilling than to be at peace with the so-called "good" just as much as the "bad"?!