My eyes are burning from the op.
Nothing personal, just want to point out: There's no such thing as a "true fan". You either like/love something or you dislike/neutral. While being knowledegable or supportive of a franchise or whatever is great, you're no more a "fan" than anyone else. There's no need to prove you like something more than someone else, just revel in the enjoyment of it together. With that said, Animal Crossing is one of my favorite things ever (along with Isabelle).
I believe a true Animal Crossing fan is someone who can sit down, play and enjoy the game.
Someone who just thoroughly enjoys and loves playing the game.
Someone who doesn't make it a competition, to say who's the better fan.
That is why I am a true Animal Crossing fan.