Here is my thesis skin: http://www.mmoburn.com/light-blog/ I'm going to release it as a premium skin with 10 colors ... Please help me review my skin. Thanks!
Well, when compared to all these DIY themes samples, your site is not close to any of it. The reason I'm getting more pessimist rather than suggesting you with details is that you are designing it for reselling purpose and you can't expect have a premium theme ready just with suggestions here if it's so far the best you have done before having it listed here for reviews. The thing is we can add up 2-3 out of 10 but can't take it to 7 from scratch. Don't take it otherwise please! just an honest opinion! Cheers!
You need to watch for duplicate content, there's a lot of it. One example "What Is Audible?" Your site won't get very far in search, possibly been filtered out or even penalized. I only had a look at the one page. I suggest you write your own articles, and if they've been scraped from your site, report them.
Nothing amazing but it gets the job done, colors are nice and bright, very eye catching. The 'Optin Headline' is out of place, may need to fix that.