3 reasons why Kim Dotcom should not be extradited.

Not the only reasons, but the 3 reasons I consider best.

Reason 1. Judicial
Extradition should not be used for crimes of a political character.
This argument is actually written into the statutes Extradition Act 1999 Section 3.
It's very difficult to say there is no political motivation in the United States as major political campaigners  are linked directly to the case and linked directly to the offices of the President and vice-president.
In New Zealand, after all, with the political controversy this case has caused it is increasingly difficult to see there is no political will to see Kim Dotcom extradited.

Getting the hover hand from Kim

Reason 2. Non Criminal
None of the crimes Kim Dotcom is accused of in the USA are actually illegal in New Zealand, so no New Zealand court can pass judgement on those crimes. Also, some of the crimes he is accused of don't actually exist in the USA. Others like the controversial RICO act are impossible to relate to New Zealand.

Reason 3. History
We will be  remembered for extraditing Kim Dotcom.
A lot more information is likely to come to light that will prove that Kim Dotcom is a pawn in a sinister game involving Hollywood, Bankers, Security Agencies and Politicians.
How the Romans and the fifth prefect Pontius Pilate are remembered for the crucifying of Jesus, is how New Zealand will be remembered for sending Kim Dotcom off to the USA to wear orange.

By extraditing Kim Dotcom, we will create another international cyber martyr and the green image of New Zealand will be tarnished forever.
1. For extraditing him and
2. For being a lackey of the USA

Any one of these reason is enough to show his extradition is simply wrong.