I'm in the process of producing a motion design reel and have a few questions...
First, I really need adduce on the best approach, i.e. showcase everything i know, based on technique. Choose my best work or choose work based on tools used to show range.
Also I'm assuming the dvd hard copy is the best course of action over mass emails, although if the work is of a high standard why woulds they mind as its more convenient than accessing a dvd player.
For a Motion Design Reel I would showcase everything to show range. If they are interested in only one aspect of Motion Design such as 3D animation then they can always ask for more. I think viewing reels on the web is becoming more and more common. I think it is best to give options. But I have to say, I personally prefer to look at reels online. A matter of fact, the COW will let you put an HD reel up on this very site.