Fairweather fans
Ditch as soon as things get tough. 1 loss = never good. Once the guy/girl wins again they "magically" return and pretend they were on boat the whole time.
Know-it-all fans
The fans that try to breakdown with their Cheetos-ridden fingers how a fighter could easily win fight xyz, in between their slurps of monster energy drinks. A common example is the guy who took a few boxing classes and acts he is the shit without realizing all the elements involved in MMA that aren't present in boxing.
Financial/Business fans
Tend to argue with PPV numbers and view counts even when something ridiculous happens like a legitimate contender being cut for something minor. As if they are somehow earning a cut from the UFCs profit. Legitimately feel that these are good arguments even though in reality they don't earn jack shit.