Genesis is a WordPress Framework that has many built in features, and my main tool for building WordPress sites. Genesis and its child themes have many built in advantages: clean, secure reliable code, great tech support, built in widgets for featured posts and pages.
As with WordPress, there is a great community of Genesis developers who support each other by providing code snippets and plugins for customizing Genesis themes. The css selectors are standardized as is the PHP code. So if you are familiar with one genesis child theme, you are familiar with many.
Developed by Studiopress, the Genesis Framework is one of the most popular theme frameworks for WordPress. check out the plugins and child themes developed by StudioPress specifically for Genesis. StudioPress also provides great tech support and tutorials for each of their child themes. In addition, there are numerous third-party child themes and plugins that serve Genesis developers.