These are brilliant questions, Krapp! Now that's some critical thinking I want to practice.
To answer your questions:
(1) I'm seeking for a news source that could ignite some "ah! interesting view -- never thought about that before" moments. I think that would be helpful after my getting bombasted by the 5 news channels (which usually shares similar attitude towards topics) every morning and just before I getting emotionally carried away.
(2) To answer your second question, we need to clarify what I meant by "alternative news source." I consume news from China, Japan, and the US everyday. Each country would have its own "mainstream voice," and it would be inaccurate to call any of them "THE mainstream" or "THE alternative." Therefore, my definition of "mainstream" is not country/party-specific.
Rather, I define "mainstream-ness" with accessibility. Which side of the story am I getting bombasted on? Which news channel pops up everywhere on the TV at my local pub, in streetside news kiosks, and in my podcast feed? And what tone/attitude/opinion they share towards topics? Answer to these questions would be considered "mainstream" to me.
Therefore, it's not about "always countering which news sources." I should have phrased myself more like, "What are some news sources that specializes in giving voices to minorities (NOT esp. ethnically)?"
Thank you for your questions. They have been very provoking.