I was reading Wikipedia when I came across a word I had to actually look up: gravitas. There was the exact same thought/feeling that you get when you hear somebody call your name: "that's me!" Gravitas seemed like the perfect username to carry across sites. Well, almost perfect. It was lacking something. Admittedly, I can be a bit too serious all too often, but when I'm not I wrap my absurd humor around that general personality trait and act ridiculously serious. So, I took "Dr" from what was then my current username-which-shall-not-be-named-here and added it to my new found name. Dr. Gravitas: a playfully absurd Mr. Serious.
It didn't become my furry name until a while later, when I used it as my name in Spore. At the start I had no problems with furry stuff, but wasn't really interested in it either. After quite some time on Spore, my username had slowly accumulated bits of background, development, and characterization when I began to look back at all the stuff I developed and realized all of my, and the character's, favorite things revolved around civilizations of anthropomorphic Foxes. With that realization, I granted my name literal form in the shape of one such creation.