I've been thinking about this a lot today - how much do you let your main character's views into the 3rd person POV?
I used to always think the 3rd person 'narrator' had to be invisible and neutral, but a recent bit by Oates has me thinking. For example, would you have a bit that went:
Bob sighed, and said 'Whatever you want. It's fine.' Carol could be such a bitch sometimes.
Where the second sentence is Bob's thoughts, not a truly neutral statement?
How much can the main character slant the 3rd person POV? Could you do a sneaky unreliable narrator this way?