How to Avoid "Zombie Eyes"

Try to avoid "zombie eyes"

Eye direction is one of the most important things to get right in animation. If your characters aren't looking at each other, or their eyes are wandering around, the effect is to produce "zombie eyed" characters, who don't seem to be looking at anything.  

So how do you avoid "Zombie Eyes"? The answer is, use the Eye Direction Controller, and always add a blink on a head turn.