Wharton essay--Help

One of Wharton's essays is as following:

Describe a personal characteristic or something in your background that will help the Admissions Committee to know you better.

对于这个问题，我能泛泛地讲我的性格、爱好、和背景中有利的地方？还是要focus在某一方面？

Urgent. Help please?

focus of course.

一定要突出自己，即便是写自己喜欢打麻将也要从人文关怀的高度上写。

个人意见，仅供参考。

Describe a personal characteristic

Should be just one.

If you just tell a story about one of the most meaningful things you've done in your life to reflect your social responsibility, can that be considered "something in your background"?

Thanks!