Tweaking Blog Layout

I have started tweaking the layout of this blog. I have made some changes based on my perception of aesthetics and usefulness.

For example I reduced the font of headlines, removed the divider of the main content section with the sidebar to make it look spacier and changed the post titles to a different distinctive color among other small changes.

I am considering removing the recently discussed section and placing it in archives. I am also thinking about highlighting the most discussed section as a second box on the side of headlines.

What do you think of the changes so far? Do you like them or hate them?
Do you have any suggestions for changes to my blog layout?
What do you like most about my blog?
What bothers you most?

I would deeply appreciate if you could write me your answers in comments or better yet use the contact form.