I have not been to FF yet. But, of the many options in NYC, it will be the one when I am ready. (I am a victim of the recession -- I went from making a lot of money, to unemployed now for a year. No violins, please.)
So, why FF?
You are great marketers (incidentally, my profession). Your Website is professional, and the updates are ongoing. Which signals that you ladies are very involved, serious and enjoy what you do. The abundance of pictures, which no other dungeon has on their site, doesn't just titillate and encourage lust but also demonstrates sincerity and commitment.
Ah, and then there are the candids. Something no other site has. This is where as Doms, you expose yourselves in a magnificent way. Let's admit, the Mistress/Slave relationship is a peculiar one. It is all an act. And like most relationships in life, we play roles, except to a few very close, trusted people. The candids give us a glimpse of reality. It also throws our expectations, and heightens the fantasy. How could such lovely, young women we see shopping, eating ice cream, drinking coffee, goofing off in Chinatown, possibly share the warped fantasies we do? They show your complexity and spirit, rather than the typical images of The Cruel, Demanding Mistress. The women of the FF are more desirable by exposing their warmth, and the impossibility of someone who seems like a girl you'd sit next to and lust after in a college English class, being someone who may piss and spit on you, kick you where it counts, whip, trample, and so on.
From there, yeah, it is all the obvious. Personal attraction and mutual interests.
Some day, we will meet.