Wow. This is a big question! I'd have to say that the book bloggers that I appreciate most are the ones who indirectly got me started blogging. Last spring I joined the college students group on Goodreads, and then the facebook page for the group.
The bloggers of the site The Broke and the Bookish post reviews on the Goodreads FB group- I guess they run the college students page (it's really early so please forgive my rambling).
Anyways, these bloggers indirectly brought me in to the book blogging community, and when I started my own book blog, their different blogs really helped me see how it's done. So thanks to The Broke and the Bookish!