Disagree all you want. Lead as much as you feel equipped to. Prove your point even if you have to go down fighting. Question, because it is necessary. Investigate, because that should come instinctively. Stand up for your convictions. Make a big deal, if the situation calls for it.
But do you have to be so obnoxious while doing it? Is there really no better way to be heard? I find that hard to believe.
Sometimes, also listen.