You have an over the top swing that is too far outside of the target line.
You want more power and notice your swing is rather flat or your arms remain fairly parallel to the ground.
You tend to flip the club with your hands and want longer drives.
You feel like you are coming in and over the top or the clubhead travels to the ball too much from the inside.
You want more speed.
You are sliding too much of your bodyweight towards the target or are leaning towards it as you approach the ball.
Your friends call you an army golfer because you swing hard and the ball tends to fly off to the left and right of the target.
You want to gain extra distance off of your tee shots.
Your swing feels tight or restricted and you are not getting the distance you want off of the tee box.
You hook your drives.