I like Drupal. I like Drupal because it makes me money. I suspect that, in the coming few years Drupal is going to be making a lot of people a lot of money. I can see Drupal developing to become a whole open source economy, with businesses collaborating to build free software - and Drupal's Voodoo Doll Architecture will be making this possible.
So, here comes the Voodoo Doll analogy. Consider Drupal to be a soft, pliable center into which you stick the functionality you need. Drupal really does make this possible - as long as you have built your module with the right elements, it will work with any other module stuck into the core. The Voodoo Doll architecture means that each module is sharply focussed, doing only what it needs to do - and you can combine as modules in any way you desire. Drupal is not in any way unique with this kind of structure, but what does make Drupal stand out is the fact that Drupal is at the centre of a rapidly growing economy.