Well, the thing is if this is supposed to be a 'creative' type essay, is it a good idea to incorporate MBA drives into it or should the focus be on the personality traits and self revelation
I think you should focus on personality traits or self-revelation that have some connection to your MBA goals (in a very general sense). HOWEVER! You don't need to make a direct connection.
In other words you don't need to say "Doing X activity has allowed me to acquire the skills to better understand marketing." For these types of "creative" essays, you don't need to (and probably shouldn't) mention your MBA goals. HOWEVER! You should highlight traits or reveal something about yourself that would put you in a positive light in the adcom's eyes. After reading the essay you want the adcom to think "This guy would be a great fit for our school!".
For example, you might say "The person who has had the biggest impact on my life is my grandfather because he taught me how important honesty is." Leave it at that. You don't need to state the importance of honesty to your MBA goals, it's self-evident. But it's important that you highlight something relevant.
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