I've found (through my own polling and studying research of others) that the "NT" personality types are more likely to be libertarian and less likely to be big-government democrats than most other types.
Here is probably one of the best resources on the net for comparing personality types to political preference, except that it doesn't distinguish between libertarian and independent. However, this may be beneficial because I'm sure there are many independents who would identify with libertarianism if they knew more about it:
One of the key terms democrats bring up when talking about the successful is "fortunate" and I've met many who think raising taxes is justified because success comes from luck. There is a concept behind this called the "Locus of Control" theory. Basically it suggests people believe that their fate is controlled by free will versus luck to varying extents. You can test yourself on it here:
My result was overwhelming in favor of free will, which goes hand-in-hand with libertarianism.
Remember, the communist looks at the wealthy man with the big house and garage full of cars and says "nobody should have so much" while the capitalist looks at the same man and says "everybody should have so much!"