I can answer this question based on the authoritative and comprehensive work of L. de Jong. This 14-part history of the Netherlands before, during, and after World War II is the Dutch standard reference to the topic, written over a period 22 years.

As impressive as that may sound, not to mention look, there have been serious criticisms of the work, and it is very good to keep in mind that the specific part I will quote was published in 1974: years and years of research has passed since then, archives have been opened, new evidence uncovered, etcetera.

All of that notwithstanding, the book has the following to say about the early German attitude:

In Norway and Denmark, Hitler was dead set against a Militärverwaltung. Indeed, De Jong interprets certains statements by Hitler as implying that Norway and Denmark would be integrated into the Grossgermanische Reich. The specific phrase he bases this on is a phrase used by Hitler to Alfred Rosenberg, who was in contact with Quisling, a well-known Norwegian collaborator. On the day of the invasion of Norway, Hitler told Rosenberg: 'So wie aus dem Jahre 1866 das Reich Bismarckes entstand, so wird aus dem heutigen Tag das Grossgermanische Reich entstehen.'

To translate: In the same manner as the Bismarckian Empire came into being in 1866, so too is the present-day Greater German Reich formed.

In Denmark, the Danes capitulated in mere hours, and as a result, Hitler was more than happy to let the "independent" Danish government exist.

On the 10th of May, the "Danish Model" was offered to the Dutch, specifically, the minister of foreign affairs, van Kleffens. He dismissed it immediately. A few days later, the queen and royal family had fled to England in any case.

A further big consideration in German policy towards the Netherlands were the Dutch East Indies. Rich in natural resources, the Germans understood that the Japanese desired the colonies. Any form of annexation or integration with regards to the Netherlands into the German Empire changed the status of the Dutch East Indies, and would give Japan a reason/justification to invade it.

Think of this as a "If the Netherlands didn't exist, who owns the Dutch East Indies?".

In October of 1940, Hitler told Mussolini the Netherlands "needed to appear independent, due to its colonial possessions". In March of 1941, Generalkommisar Schmidt, political advisor of Seyss-Inquart, the Reichskommisar of the Netherlands, would tell a crowd of Dutch NSB (i.e. Nazis) that: 'wie es uns gelingt, diese wichtigsten Kolonien die es auf der Welt gibt und die es für die ganze Welt gibt, für die Niederlande oder, lassen wir ganz offen sein für Europa zu erhalten'.

To translate roughly "These colonies, the most important ones in the world, must be kept for the Netherlands, or to be frank, for Europe."

Finally, De Jong states that Hitler planned to "win the Dutch as friends" much like the Norwegians. This meant that the Netherlands was not to be exploited to the extreme, it was to supply the German war effort with what it could, but the standard of living was to be the same as the German standard of living. With regards to the standard of living, the phrase "Gleichberechtigung" is used.

Although a military form of government was possible, Hitler distrusted his generals to handle the case of the Netherlands capably, and instead assigned Seyss-Inquart, a loyal Nazi who in the eyes of Hitler had proven himself.

In conclusion:

The German attitudes toward the Dutch was partly racial, partly based on actual political considerations.

The Dutch were most definitely regarded as the Norwegians and Danes, they were Aryans, fellow Germans, Nordic supermen, however you want to phrase it.

Another large part of their considerations revolved around the Dutch East Indies. It was a territory simply too rich in resources for the Germans to hand over to the Japanese, especially given the oil present there.

Please note that this is just a description of the German attitude up to and right after the capitulation of the Netherlands. When the Japanese finally invaded the East Indies, that reason obviously fell away. As to how that changed the situation, I cannot answer right now. Furthermore, there would undoubtedly be small changes in policy throughout the next 5 years of war. Nonetheless the Dutch were in general treated comparably to other "Germanic" people, the Dutch were among the first non-Germans allowed into the Waffen-SS, and the Reichskommisariat (i.e. civilian administration) stayed in power until the liberation in 1945.

Source:

Het Koninkrijk der Nederlanden in de Tweede Wereldoorlod 1939-1945: Deel 4: eerste helft, Lou de Jong, p.26-31