Task versus time

There are two different ways to program workouts: time priority based workouts, and task priority based workouts. A task priority workout is done for time, or as fast as you can. For instance, doing a certain amount of rounds or reps is a task workout. For example: “Complete 5 rounds,” or “Complete 50 reps,” etc.
A time priority workout is usually an AMRAP. If you’re doing as many rounds or reps as possible in a given time cap, that’s a time priority workout.
You probably find you prefer one over the other. For many people, an AMRAP is a mental game, and you may find you tend to hold back for fear of “having to do these movements for so many more minutes!” When you’re doing a task priority workout, you may tend to think “after these reps I’m done, so let’s get them done quickly!”
Which do you prefer, and why?
7 November 2013
AMRAP in 20
5 push ups
10 standing lunges holding med ball
15 wall balls