If it were truly an uninfluenced personal decision than tattoos and piercings of the same sort wouldn't be so damn common. Instead, what you see is people that hang out together also look the same yet they claim that it's a personal decision. It's not. This isn't exactly a startling revelation either, but that's my point...
Why not just admit it? Why claim that it's a personal expression of creativity (or insert reason here) instead of just stating that you think it looks nice on you? There's a million different ways to express yourself that are truly unique yet seemingly everyone picks the same damn route and you've got the cahones to tell me it's a personal decision/choice?
And I'm the one that's ignorant?
It's only personal insofar as that every one of them looks the same and goes out of their way to look the same. That isn't personal, unique or creative.
http://www.phrases.org.uk/meanings/birds-of-a-feather-flock-together.html