Honestly, in the modern world where it seems like every large website has been screwing their users for short therm profits, it's been nice seeing fA being mostly stable and user centric. It's also responsible for the huge growth of the furry fandom.
I don't know much about him as a person (and given some people's responses, I probably don't want to...), but furaffinity has been an amazing site, despite it's ups and downs.