Analytics and statistics is important. Now they have a picture of who reads their blog. Things like these can be offered to your advertisers. They create cute posts that are quite engaging, interaction is key too aside from the usual content.
Cult blogs are not that big but if you get exposed with that as well, then its genius! You have to build your brand in a way where they will also follow you in social media. When you have posts in Facebook you have to also consider interactions. If it gets shared, liked and how many individuals have seen it says the Googley Gooeys authors.
Your media kit show your style and point of view so the advertisers understand your blog. Bank on your blog and always make it unique.
I'll probably work on mine hehe :)
Kumagcow.com