(more on: Passion without desperation. The ability to care deeply and still realize that there isn't much in life worth getting deeply upset about. The ability to enjoy damn near anything.)
I know what it's like to get upset about the tiniest things, only later realizing how unimportant they are. But more so, I realize even with important things, how counterproductive it is to get upset about them. Getting upset is an outlet for passion, but it seems to be one of the less constructive ones. The statement above is a rejection of drama as an everyday part of life. Ongoing anger and jealousy, for example, feel destructive to me. It's alright to get upset.. we all do, but I try to resolve it internally after that. Drama cannot escalate much if even one side remains calm.
Maturity? Maybe not. It's a personal goal of some kind. In a way, it's spirituality. I don't want to walk through the world projecting angst onto everything around me. I want to remember the positives when things suck, building on their strength. To have control of myself. I believe we have a lot of control over our emotions, that much of them is cognitive or can be, and not an entirely separate hormonal engine. Passion is not inherently less beautiful to me if it's conscious. I don't want to be driven by fear.
Appreciating "unpleasant" things comes from the others. If the mind rejects reactionism and chooses an emotional response, many responses become possible. Such as: "Oh, what a lovely boot! I'm glad I got to see it so closely!" after getting kicked in the face. Maybe it's just optimistic thought, maybe it's clinical detachment. At first it's just another kind of reactionism, but it becomes something more. Sometimes experience is the number of perspectives you can truly see from.
Life is beyond our control. But our responses are entirely our own. And they're who we have to live with, all the time.