While I like the improv tracks to varying degrees, it's the full band written songs that I always go back to the most. So for me, I went with:
Paradigm Shift
Freedom of Speech
Universal Mind
Another Dimension
When the Water Breaks
Was hard not including Acid Rain or Biaxident, as they are both great tracks too. And Kindred Spirits is good, but my least favorite of these full band written songs.