Activity essay on the Common App question; should it be more straightforward?

Hi, I was wondering whether there is a specific style that is more appreciated for the activity essay. I wrote mine more like a literary piece rather than an actual explanation of my activity but now I'm wondering whether it should be more straightforward. I noticed most of the activity responses up on this site tend to follow the latter method.

So again, is it ok if it just presents a descriptive image of my activity (of course, with a couple of sentences of what the activity meant to me)? Or should it just handle facts about achievements and explain what the activity is and such?

Thanks!

I don't know the best way but I can offer how I wrote mine:
Mine is a reflection on a comment I made to my parents after coming in last in a track meet back in the 7th grade. I go on to explain that I did not know the weight of my statement but I had, without knowing, made a mature/enlightened statement that I had gotten a "personal record." I was ecstatic. I did not even think to be upset about my place in the race.

So basically I wrote about my love for running and my positive attitude in one nice, tidy little paragraph.

No specific, but you should write on only one specific activity.