One of the rather notable things sbout Hitler was that -unlike, for example; Goering; who seemed to have made it his lifetime ambition to amass every possible order, decoration and medal-whether German or foreign-Hitler deliberately cultivated an image of modesty-this extended to his uniforms, which lacked rank insignia-and thus he stood out from his Field-Marshals and other higher ranking officers-who would have been positively dripping in bling (Goering especially!)
Hitler wore three decorations: Iron Cross (1st Class), Wound Badge (3rd Class), and Party Badge (wreathed in gold). This was even though he was entitled to several more (a couple of Bavarian military merit crosses, as well as the Iron Cross second class)
These three decorations are easier to focus upon than Göring's many, thus they become more significant. In short they say, "Germany recognised me for courageous service," "I was wounded in Germany's service," and "I was one of the first (100,000) members of the movement."
In line with all this, Hitler made a point of (politely and diplomatically) refusing orders and medals that were offered to him on state visits (as is usually the case when a visiting head of state visits another country) to allied axis states and indeed neutral ones.
There is one exception, however. On one of his state visits to Italy Mussolini granted him the rank of 'First Honorary Corporal' in his blackshirts militia-and wore the rank insignia and ceremonial dagger associated with this rank. Unusual for Hitler-but given the esteem he Mussolini, particularly as an 'inspiration', not surprising.