Hmmn. Ever considered getting a full background? The red background you currently have just stops short in the middle of your latest post. After that it's all white... perhaps a full red background? Might improve the look because of the contrast. And I like how it looks from the top :)
The logo. It's a bit plain don't you think? You can do better with a more striking one :)
Also try increasing your post title's font. When I see your posts the thing that catches my attention are the images. And I really don't get it fast with just the images. So maybe if your post title's font is a bit bigger they would catch my attention instead.
On the sidebar you can try increasing the text font too (too small) and perhaps remove the underline on the links. Just try it out. I bet it would look more 'clean'.
That's all I can think of for now. Nice themes in your collection btw.