Taxi Driver

The character was so flawed, from the very beginning, and everything went astray from the first half of the movie onwards. The end seemed rather poor but served its purpose well. Robert De Niro was fabulous without a doubt; but the real gem lay in the character that was created by the writer and shape given to it by Martin Scorsese. A particular part of the movie stood out:
This is when Robert meets the secret service agent and Robert acts like, or is, a complete moron, similar to a village idiot; he was very convincing - It reminded me of real idiots who mouth inane sentences and people at the receiving end tend to have monologues running through their minds. Also, the length of that encounter did not seem to serve a real purpose, which stuck out for me.