"What is the thing you like most about reading book blogs? Is it the reviews, author guest posts, articles, giveaways, or something else entirely?"
I would have to say the reviews and author guest posts are what I like most. I love to read about how another person feels toward a book that I either love or couldn't get into and also what authors have to say about the world they've created.
"Do you have an under-noticed author that you think we should all know about?"
Hmm..it's really kind of hard to say now since most of the authors that were unknown or undernoticed are becoming quite popular and are hitting the best sellers list even though their book has been out for years, but if I hit one i'll be sure to blog about it