The few photos where Hitler isn't in his usual garb are the most fascinating to me. To see him just like any other person of the time lounging on a chair in a suit is almost surreal.
Also the rare shots where he was caught smiling or in an animated conversation with people are pretty interesting.
Whenever I see threads like this on any website I am always reminded I still need to watch that German film "Downfall". It is supposed to be a really good film on those last few days of his life.
http://www.rottentomatoes.com/m/downfall/