Aiming your putter face to your line and then moving the putter down that line is paramount. How you stand at your putt matters not. More important is what stance (for you) makes it easier and comfortable to see and align yourself to the target line. Experiment with different styles of stance and posture until you are most confident about making putts. Then stick with it. Remember proper alignment relates only to where the putter first faces and then moves through the ball on impact to your target.