I guess I've been around WP long enough to give some reference to myself.
I am an expert in the sport of Track and field athletics with over 40 years of experience on all levels and functions.
As an offshoot of this I have leapt off to create a few missing articles that have related to knowledge I have gained in working with the sport, sometimes the reference is oblique but still referenced. For example, I spent time marking defunct schools who I am familiar with through their athletic results. I've also added to other subjects I have knowledge about such as my profession of Television, or the musicological knowledge I gained from my early days in radio. With a Masters in Mass Communications, I have an anal retentive streak for poorly written articles. As I find them, I have used my english and developing wiki/html skills to correct many poor articles.
As I roam through wikipedia, I am getting increasingly more upset with those who attack articles they do not understand. There is too much of a movement to create articles for deletion and adding unnecessary BLP unsourced tags. If you are able to read the article and understand the subject, then you should be speaking about its content. For the un-human bots who are placing improper references and the people who have no expertise in a subject denying an article's significance, you will attract my ire.
My wiki philosophy is simple (taken from the statue outside Faber College ). Knowledge is good.