I started watching mma almost immediately after Zuffa bought the UFC before UFC 30 (which is no coincidence).
The UFC 30s were significantly better than the UFC 20s, imo, and it just snowballed from there. I started watching at UFC 34 planning "UFC nights" at UFC 39, and I have never missed a single available fight since- and certainly never an event.
Immediately, they began hitting new plateaus. They built stars, put together huge fights, and grew the sport exponentially through TUF. I can go on for hours (literally days) talking about every event, champion, rivalry, TUF seaaon, and star in history.
I don't watch football or baseball or any of that bullshit. MMA has been my favorite form of entertainment for a long time.
Because of ZUFFA, it's everywhere. FOX Sports is almost like "The UFC Network." About once a week, I'll just look at all of the UFC programs and I'll just sit there in amazement, trying to remember what it was actually like when it was some sub-culture (for a while, counter-culture) monster-truck shitbag "sport."
They were really good to us. One last (almost personal) gift from Zuffa was the legalization of mma in NY. I've seen 5 UFC/PRIDE events: Vegas, Connecticut, Philly, and 2 in Jersey. I can't tell you how happy I was when they got it done.