DP/Director reel

I think that a good reel would consist of only the person's best work and it would flow together somehow. It shouldn't be a bunch of shots put together randomly with some music that you think is cool. It should have pacing and tell the story of who you are as a director/DP. For instance:

Andrew Kurchinski Director Of Photography Reel 09 from Andrew Kurchinski on Vimeo.

This one had to be one of my favorites just because it had all the elements a reel should have. It had pacing of the shots with the music he chose, and it had stunning visuals from the films he shot. It was also quite short which is good. You don't want to present a 3 minute reel because often the people you want to look at your reel are employers, and they have short attentions for your work because they have to sort through tons of applicants.
A bad reel is this:

There is nothing that stuns me. It doesn't compare to the work of a dp that uses HD or uses quick shots of their work. This one held the shots too long and didn't have high quality work.
A DP would have to show how they can light a scene and how they can move the camera to show a feeling and tone of a particular shot. They would also have to show they can work in all sorts of locations and shoot what they may not feel comfortable with, such as timelapse or interview style.
A director reel would have to show creative works. They would also have to show that they can pick the right DP, because their work can be misrepresented by that choice.