Hey! Well, I'd recommend you choose a topic that will focus mainly on you--anything that focuses too much on "they said this to me," or "They think this about me" will move the focus away from you. Think of it this way--the best PS's are about things a person has done, done well, and can write enthusiastically about. Often, the most...misguided...statements are about something that happened *to you.* This means you won't be active in the PS--you'll be passive, just observing and recording whatever craziness is affecting you. PS's that essentially sum up as "look at how crazy/annoying/weird/sad my world is!" won't work all that hard at selling you as a law-ready candidate.
The PS is your opportunity to show what you do when you're in charge, how you make decisions, lead, etc. Anytime you consider writing about something someone has done/said to you, it had better be a whopper--and I mean the size of "my dad turned out to be a woman" or "I grew up in the circus."