I had a chat with an LA producer about two ideas for screenplays. I sent him the loglines and he was enthusiastic about one of them and told me forget about the second concept. He stated another one of his colleagues had something pretty similar to my idea and has been unable to secure any interest or financing. I'm glad I chatted with him but how do you decide whether you've chosen a worthy topic for your screenplay? I read a recent article by Quentin Tarantino where he explained how he misjudged what audiences would like when he made his 2007 grindhouse film Deathproof. So even really successful filmmakers can take an occasional misstep when choosing ideas.