In our view, there is absolutely no point in having a fabulous framework like Genesis if you are not going to add a superb child theme. Admittedly, we heavily customise the child themes we overlay on the framework dependent on our clients requirements. However, we always start with one of the stunning child themes from StudioPress.
Starting our customisation with a known base saves time and hassle! The child themes are built especially for the Genesis frame work so we know they are always going to work. The fact that Genesis and StudioPress child themes are so well supported gives us and therefore our clients peace of mind.
Check out the massive selection of child themes here!