after looking at a few of your hubs I would say you need to:
a. Make sure that your hubs have at least 600 words. I personally try to stay in the 1,000-1,200 word range.
b. Only have one photo, video, or poll that is full width. Make the others smaller and to the right side. The larger photos break up your content a little too much.
c. Use some Keyword placement and link placement in your headers. Your #5 Ebay hub looks to be the right lenght and pretty good on layout. Always try to use as many different types of capsules in each hub as you can (text, video, photo, poll, links, etc)