Great point. I think my interpretation of the word in this context has drifted from the norm because I've built such a philosophy around it. How else can we describe the manifestation of "passion" that I wrote about? Is "focused ambition" any better of a way to name this?

"I liked band enough to stick with it for a couple years, and that's an Activity, and I can write something convincing about my passion for it. Therefore I can't quit band now that I've stopped liking it because then what would I look passionate about?"

Here's a virtual high-five for capital-A "Activity." This is the kind of thinking that guides otherwise brilliant students away from their ultimate potential.