Reel of Examples

I find when looking at showreels the best are usually around a minute and showing a variety of character and animation styles.
You get something like this. A Calarts student who has shown her skills right off the bat with sturdy drawings and animations filled to brim with character.
The only problem is this it goes on to long but this is only a minor flaw. Overall it's a confident reel.

On the more flash based reels you get examples like this. The most impressive is there work on  El Tigre which showcases good character motions and design. The video proudly showcases the competence use of Flash.  
The timing doesn't go on for to long the only real problem is the animation falls a bit flat at the end but it has already gained so much interest from the beginning.


 
This one above is my favorite as it shows a variety of styles and a wide knowledge of multiple programs. It doesn't last to long and over all gets straight to the point. You can see this persons talent from start to finish.