My friends.
Main reason and pretty much why it sums it all. Even though people may talk bad or gossip about each other, I do tend to have an enjoyable stay. The people who I talk within game and Skype are the closes. I am thankful to be their friends and have much fun <3
Not only that but showing off my characters. I tend to have competition when it comes to who has the best character. XD Okay, not all the time...but I am very crazy when it comes to adoptables. Then, OCD comes up. XD But anyway, characters and the presets. Something you don't see in other games and shows results why FH unqiue.
Lastly, the community.
It's active, friendly, and just the best way to meet friends. I personally enjoy that.