Drupal Gardens Template builder: Can I have this feature on my site When you build a new site on Drupal gardens, you can select what features and blocks/regions you want on your new site. 

Is there a module, which would let me choose my own set of features each time I create a new site on my own hosting (i.e. separate from Drupal gardens).
Fusion theme + Skinr module will get you part of the way there.  DG may have some customizations that are not available outside of their walled garden.