I'm writing a paper for my German Expression through Nazi Art, Art History class. The paper is on the similarities and differences of the aesthetic of Nazi Art and Hitler's personal art that he made. I know that Hitler had an influence in the propaganda that was being made for the Third Reich, and I'm pretty sure he never personally created any of it, but I'm not 100% sure. There is not a ton of information on these subjects so any additional information that any of you might have or know of would be helpful as well.
Hitler certainly had an effect on the type of art that was popular during his reign. The most striking example is the exhibition on "Entartete Kunst", which took place in Munich in 1937, and the exhibition on "german art", which took place at the same time. The opening speech sums up his idea of art pretty well. The influence also extended to music (with Wagner and Operetten being most popular), architecture (Speer and "Germania") and sculpting (Arno Breker).
Having said that, I am not aware of Hitler using his personal art for propaganda purposes. However, I did find a mention that Hitler made a draft for a swastika flag in 1920 (http://www.spiegel.de/spiegel/print/d-46408313.html). This seems to be an exception, however.
As he became more famous after the first World War, Hitler tried to suppress sources on his life before the war. In 1938, he tried to rebuy all paintings done by him. The existence as a poor and not very talented or famous painter did not fit with his status as dictator anymore.