There is no 'particular experience' that gets you in, whether you're a college senior,
experienced candidate, or newly-minted consulting/ib/pe analyst alike. What distinguishes someone is not the experiences he/she has had, but what those experiences show about him/her, and what they had learnt from the experiences. This shows a school 1) what type of experiences you're likely to seek out in future 2) what you will do with those experiences. Do you grow from strength to strength, or stagnate? Do you make those around you more productive, or do people dread working with you? Do you
effectively influence others, or do you only work well with yourself?
These are all traits of a successful leader and business professional in general. Evidence of such traits can come from anywhere in life, and so a successful college applicant will have to think about how he/she can communicate such traits using experiences that may not come from work.
Good luck! | 
