Your power card

I just watched a screening of an interview with Warren Buffett (Columbia MBA '51) moderated by Professor Michael Feiner who is a legend at Columbia Business School.  The film itself was interesting regarding personal ethics and value, but the key takeaway I got from it was from Professor Feiner, speaking upon his corporate career at Pepsico.  He said that everyone in the room (all Columbia students) have that one thing that they know they are irrefutably, undeniably, indisputably talented in.  Make that talent your power card and use it in any event of a work crisis as leverage to, in Feiner's words, "take no shit from nobody."  When applying this to actually getting into a top school, you absolutely need to know what your power card is.  If you're unsure of it, go back as early as you can and figure out what was the one area that 1) you repeatedly showed the strongest aptitude for and 2) how can you make it work in terms of a possible career.  If you base your Essay One (I broadly refer to this topic as Essay One but it can be any number - the standard "why us, why MBA, why now?" question) on your power card, it has the ability to convince a skeptical reader that you're a contender and that your enhanced self awareness will an asset to the program.