I didn't really base my fursona off my own personality. No real individual characteristics to it yet though. I guess a fursona means something different to many people. Some have fursonas which perfectly reflect how they perceive themselves, while others do not.
I chose a winged lion because it is the exact opposite of what I consider myself. I am not vibrant in my personality, I am not the dominating force in a situation, and I am certainly not a master of the earth below and the sky above. I chose my fursona because of the inherent opposing forces of what is expected of a lion, and what I expect of myself.
But in the end, it is your own decision. Best of luck.