I grew up finding the Gambino Family to be the most interesting. I now find the Lucchese Family to be the most interesting due to the old school nature and clout of its high-ranking members. I would also say the Genovese Family for the same reasons, but too little is known.

Finally, I find Vincent Assaro to be an extremely intriguing figure and the kind of person that can bring that family back from the abyss.