This is a good example of Nose Room as it looks as if the actor is turning his head away from the screen. This makes it uncomfortable for the viewer to watch.

This is a much better view of the actor as it looks like he is in a conversation replying with an expression rather than turning his head away from it in the picture above.

This is a good example of how to use lead room. The first image on the left is a bad example as it looks as if he is falling off the screen whereas the picture on the right is much more comfortable and his eyes are roughly in the third grid line up.

The rule of thirds. This is a good picture as it has followed the rule of thirds. this is then the characters eyes are located in the first horizontal line which gives us the viewer a more comfortable view.