Hmm. Mostly, I read to learn -- to check my mental map of reality for consistency. I am not after confirming my own beliefs. As Montaigne wrote, "Why should I not run to embrace the truth when I see it coming."
I have asked at notable blogs populated by liberals for pointers to helpful blogs to read. Their pointers have not panned out. I still look, but feel like Diogenes in search of an honest man.
More to the point. The statistical song and dance engaged in by the aforementioned research paper illustrates why political science is the laughing stock of academia. Research paper, indeed! The leftness or rightness of a blog isn't worth a rat's ass. The quality of thought is the issue.
If more bloggers find quality thought here than elsewhere, well, good for them. The idea that I should venture into arenas of foolish thought and vacuousness to appear open-minded is hilarious.