Or MMA in general? I overheard my friends talking about "how sick the fight was last night" so I decided to ask them what were they talking about. They were talking about "UFC145 Jones vs Evans" so I decided to watch it and I couldn't grasp how exciting this sport was, the sport I never even paid attention to. So I decided to watch every event from UFC145-to present as well as the older fights before 145. I also train Wrestling and such, so it also influenced me to watching it.
I was a boxing fan originally, and still am, but, MMA is more dynamic since you can use everything.
I watched UFC from the start with Gracie and Ken Shamrock. You have to understand, it was even more appealing back then to the adrenaline rush. Mainly, because the rules were less and fans didn't have any knowledge about MMA so we thought people could die in the ring. The conversations back then, if you heard them, were probably funny to a MMA fan today. Mainly, because we talked about everything being possible. Now, theres an understanding of the athletes and what works.
So what kept me a fan this long? The fact it keeps evolving. At first it was shoot fighters and BJJ, then wrestlers were taking over, then liddel came and striking and wrestling was needed, now, its pretty much a greater chess match today. We see that BJJ and wrestling are the two most important foundation in MMA, but that is not enough like it once was in the past. The sport just keeps growing and its interesting to watch. There are era's of whats works, but, sooner or later once its figured out the invincible champions fall.
So the reason I like MMA, is that its just so interesting for me. Its really, an ongoing learning curve. Its also a rush when you want your fighter to win.