Ok here are mine. I have two, the period where Scarfo reigned in Philly. Like a movie or something, murders all over the place, colourful characters, and the most lucrative time arguably for the family. How they haven't made a movie on this yet is unbelievable.
My other is the Gambino family in the 1980s. For half the decade you had the old school, traditional running of the family in Castellano and the other half the yuppie "look at me" approach of Gotti. Fascinating characters also, the DeMeo crew, the white and blue collar factions and a split in the family, culminating in the hit on Castellano which was like a scene from a movie.
So what are yours and why?