Here's an interesting talk on the Five Aggregates (khandas) by well-known jhana teacher, Leigh Brasington. He defines them like this:

• The first is material form: this is the hardware. The material form you can poke, you can see it. If you're two years old, you'll put it in your mouth and chew on it.
  Then there are the four parts of mind: these are the software. These other four don't have any sort of material existence, they are mental. They are
  
• Vedana, which is our liking, disliking, or not caring about a sense contact - the first impression.
  
• Perception, which is taking the holistic sensory input and chopping it up into pieces. Taking the field of view and chopping it up into the objects that we are seeing. Taking the sound that's coming in and identifying it as birdsong, big truck, whatever. The same with tastes, smells, touches and thoughts. Perception is the identifying characteristic of the mind.
  
• The mental formations are our thoughts and our emotions.
  
• Consciousness is the tie-in between the physical and the mental. Consciousness is that which knows. In particular, consciousness is spoken of as being six of types - one consciousness for each of the six senses, the five external senses with the mind being the sixth sense. Often the consciousness we think of when we think, "I'm conscious," is the consciousness associated with the sixth sense
  

Very good explanation.

Although already included I would deduce: The curiosity, the intrinsic motivation to deconstruct , to discover the world, to see what is what.