You have a steep, downhill putt.
When you get nervous, the speed of your putting increases.
The greens are really soft.
You notice that the ball wobbles as it rolls on the green while putting.
You want a more natural flow to your putts.
You keep picking your head up before you have completed your putting stroke.
Your putts keep skidding across the green.
You are having difficulty reading the break on the green when there are more than one dip or bump along your line.
You often look up during your putts. This causes you to pull your body back, moves the putter up higher during the stroke, and likely opens the putterface.
Your putts keep curving or rolling to the left or right of the cup.