I like Glenn Greenwald's take on this.
He says that every journalist has opinion bias, whether they are aware of, or admit it, or not. And that it's better to embrace and be open about your opinions and influences than to attempt to hide them under a veil of neutrality.
Personally my mantra is "Real journalists whistle-blow every time they write." A phrase I coined to reflect that journalism should be about telling important stories in the public interest, regardless of which ideological angle you're coming at them from.
Absolutely agree with both, and especially your mantra!
Of course, journalists have biases and opinions, sometimes their opinions or biases might change because of their own investigations, research, etc., sometimes not. And I am completely fine with opinion as long as I know it's an opinion, I really don't like articles that present themselves as neutral or fact when they are mostly opinion - so I'm completely with Greenwald here.