What best source of inspiration for RPGs?
Well, let’s just say that everything and anything is a source of inspiration for gaming; books, movies, televisions, news events, graphic novels, comic books, cartoons, etc. These are where the ideas comes form.
Also I find the best source is basically the fear and paranoia the players say during the session which also helps shapes the campaign. When a red herring turns into one of the biggest campaigns ever, that is thanks to the players due to saying something that I had never thought of and then incorporate it into the session. It’s basically a free for all when it comes to writing up adventures and adding your own twist to things that makes it all kinds of fun.