Hi,
Your site and content is good.. but i think you should reduce the width.. the images are too big. You should change the color of your tag line and menu bar at the top to make them more appealing.
Also I think things like popular posts should be in the left or right side bar rather than being in the footer to attract audience read more in your website.
In your reply box the two checkbox in the end after post comment button are not having any text please fix it.