I can be, but I try to check those traits.
A lot of contrarians seem to be motivated by the desire to view themselves as smarter than everyone else and the more aware of that I become the more I try to avoid being the I did my own research guy who's research consists entirely of reading a few things that reinforce his own biases and then being a dick to people who've read what the experts say.
That said, I'm not a particularly agreeable person and I'm usually pretty quick to question established wisdom if it seems wrong. To some extent I've learned to take more of a Socratic approach by asking questions more and arguing less. I'm also perfectly willing to let people explain things to me like I'm five in case the questions or arguments I'm about to raise are actually stupid.
Moderately contrarian but vocal would be the optimal answer.
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“Anyone who wants to thwart the establishment of a Palestinian state has to support bolstering Hamas and transferring money to Hamas, this is part of our strategy” —Netanyahu
"Many of us like to ask ourselves, What would I do if I was alive during slavery? Or the Jim Crow South? Or apartheid? What would I do if my country was committing genocide?' The answer is, you're doing it. Right now." —Former U.S. Airman (Air Force) Aaron Bushnell