1. The look and feel: I would say a more sober background. The sketch background is already white and if the page is white too, wouldn't the depth of the sketch look a little off?
2. The widgets: Perfectly selected, it's just that the placement could be more organized. But, I think you should be ok with what you have.
3. The content: I have to give it to ya..the content is awesome. The sketches have a nice warm and welcoming feel to them. First time I liked a shark 
I hope you find the feedback useful. This is my personal opinion and others might (some already did) have a different opinion. I think sometimes the more feedback you have the more you get confused. So, I would suggest taking the best of what is posted here and apply it to your blog and see if you like it. If you do not, then you can pick another option and try it out. After all, it is your blog 
If you would like to, you can post your thoughts about my blog as well. Here is my post, where I requested feedback: http://www.indiblogger.in/forum/review.php?id=4318