Technically, in game, everyone is supposed to be allies. How are guardians supposed to be guarding the last safe place on earth when their too busy fighting one another? (Besides the crucible, that's out of the question. Everyone there is supposed to fight.) But what I'm seeing on the forum is a bunch of people thinking their classes are superior to the others. Mostly childish debates among strangers. So, friends really. Just depends if you're playing with somebody childish who thinks their class is superior to the others (whom are people I recommend you avoid). Personally, myself, I play mainly as a human female warlock; though I have played all three classes to level eight and "upgraded" them fully. I like to think I show no real bias towards class.