Im not a furry but I can tell you the answer is all and some combination. I used to go to cons and con folk could range from those who just like sci fi, fantasy, anime, etc to those who are really into one particular aspect to those who its like their whole lives. Many con folk over time sorta developed a consona. They bought clothing and such and over time what they wore to the con would be pretty consistant. My wife has a story about them stopping off at a guys house and he opened the door and when he saw it was confolk he closed it and after a few mins was back in his con outfit. Like no one at the con should see him without it. For me furries are just one of the interests people could be big on at cons. I missed them when they got their own con because the general con they used to go to had two dances and the fur dance had the AC cranked to max. You could go dance at the reg dance and once you were hot and sweaty go crash the fur dance.