I still watch, but that may be more due to the fact that nothing else is on at the time versus, I have to see it. After Carter, Shaw was my favorite character. I've never watched for John, though I don't mind him, he just wasn't what kept me coming back. Right now, the show is so Illuminati driven that I may be watching just to imagine a glimpse of the many things that could be happening in the world.
I love Shaw too, though Root is my favorite character. She's just this incredibly unique and charismatic person. John isn't my favorite character either, but he's not too bad that he puts me off watching the show completely. I disagree that the show is conspiracy driven. Yes, the AI God thing maybe a bit out there, but the technology isn't THAT far off. The last couple of episodes actually feature tech that's ALREADY prevalent (think Apple's Siri)