Personally I'd say titans since they always bitch about how they're the most important.
<EDIT> to every titan who immediately hit hunters, you make me laugh.
<EDIT 2> I would like to clarify this is a question about forum presence, not lore. Lore wise it's conclusive that hunters sre the most prideful. It's your opinion on forums I'd like to know.
<EDIT 3> Holy shit!! 700+ replies and to top it off we're trending! Guess all you need to get fame is some good old fashion jimmy rustling.
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Actually hunters has been always the main bullied class since they where "not useful" at raids, instead they prefered to push atheon with warlocks granade, and titans always be like "oh you cant kill atheon without my buble". I main a warlock and a hunter, back in atheons day i needed to play warlock since nobody wanted a hunter on their fireteam. Just after crota's raid the hunters started to gain protagonism, i think is fair enough for hunters to feel better this days.