I have the habit of twisting the cork slightly back and forth as I pull it from the bottle. I do this mostly with tight fitting corks. When the bottle is full I don't want to jerk it by pulling the cork straight up. I have noticed from time to time this habit of mine will create or exacerbate a horizontal crack in the cork. About a week or so ago I finished a bottle of BT that had developed a tear in the cork so the last couple times I drank from it I had to be careful how I extracted the stopper.
Do most of you pull the cork straight out? Am I abusing my corks?