I'm pretty certain (although I can't remember now) that I got into watching MMA by someone recommending I download an early TUF, and from there I started watching TUF and the UFC fights, and then after a while all the other US events, and then finally gave in and started watching Japanese shows also - although I had been aware of Pride for ages at that time and tried watching it once or twice, the pomp and ceremony and the ring instead of a cage turned me off it for a long while, but now I'm cool with it.
Now I watch all the MMA events and related shows I can get my hands on and really enjoy K-1 also. All thanks to filesharing