Awareness and Preparation are Key for a Good Player

(Here are some examples of the Good and Bad)

A good player would be able to make an enemy surrender to him.

A smart player knows to stay with a partner. An isolated player gets killed faster and easier. (which you can see at Strategies during the game)

A good player always has his gun up and ready to fire, unlike this person here who has their gun pointed to the ground, unprepared to defend himself.

Is this a good way to kneel down? No. He can't move in that position. He is most likely to be shot. Never get yourself in a situation that you can't get out of.