Ugh... I woke up this morning extremely sore. I had a 9:00am tee time and my shoulders were on fire. I got to the course at 8:45am and had no real time to warm-up, so I settled for a few practice "swings" on the first tee, but they were intensely painful. This led to a very, very poor start as it took at least 3 holes for my shoulders to loosen up.
By the time I felt okay enough to make a full swing at anything, I had no idea where shots were going before I hit them. I played the front side in a pretty ugly 47 that included 4 doubles (one after a three-putt from 6 feet).
When I made the turn, I was hoping to get things going, but it went wrong right away. A pull-hook off the 10th tee with a 4 iron left me almost 200 yards to the hole on a short, downhill par 4. I tried to get to the green, over a tree with a 5 iron but caught it heavy and watched it drop into the hazard. This led to a triple. I added another triple on the 17th to go with 2 more doubles on the back side for an abysmal 49.
My 47 - 49 = 96 showed me that, while I have moments where I can put it all together... I also have moments where I clearly can't get the ball to the hole.
Most clubs have offset so yes, lining up the toe and the hosel together will cause the face to be slightly closed (assuming you aim at what you think you're aiming at in the first place @nevets88 ).
The leading edge on most modern clubs is slightly rounded so if you are looking for a straight line to aim with, the grooves are definitely the way to go.
Too many variables to account for. Theoretically you change your face to path relationship and generate a different ball flight, but that's assuming you don't start aiming differently on the course because the club is pointing in a different direction than you are used to or something.
My personal preference is to aim the face at address at the line I want to start my ball on, not on the actual target itself.