I don't necessarily see anything wrong with your pictures, although are a few missing? I think they illustrate what you're going for very well.
Unfortunately, it might be a camera issue. My first digital camera took okay pictures, but the one I have now is sooo much better. I pine for one of the Nikkon D60s, but I don't have that much dough to spend on a camera.
The other thing is that it might be an issue of light. I think that pictures with more natural light tend to look better online (this is just an opinion.)
All that said, I really like your blog. It gives me hope during my own decluttering process!