The great thing about AimPoint is that it removes the doubt from your mind; you just know it works. When all you have to worry about is the pace and hitting your line, you just start sinking more putts. Signing up for that clinic was definitely the best £100 I've spent on my golf game.
I don't really pay much attention to good vs. bad - don't rank them or analyze them. In fact I look at every shot from a positive viewpoint. I view most poor shots not as failure, but as an opportunity for good recovery. It's a chance to exercise my creativity and game management ability, to focus down to a fine point on the next shot.
Only the worst shots, ones that are completely out of play and result in a penalty would be considered as a failure, and even then it's an opportunity to make the absolute best I can from the poorest situation.
As a player, I find that I'm better company on the course when I keep an optimistic attitude, and usually I play better when I do. I focus on where I want the ball to go, not on what I want to avoid. I do see the area of avoidance, then flush it from my mind and focus solely on where I want to hit the shot.
Most of the courses I have played have used as tee markers either plastic orbs grounded by a stake, or wood plank not grounded at all. I feel like, if it doesn't move the instant I step on it when taking a stance, it will definitely move when I shift my weight on the downswing. The only way I think I could make a swing without violating Rule 13.2 is by staying on my back foot the whole time, which would result in a terrible shot.
That said, my belief is that the scenario laid out in the original post is a violation of Rule 13.3. If a player, when given all the room in the world to take an unimpeded stance on the teeing ground, tees the ball in the one spot where he address the ball with his lead foot on the marker, I don't see how that doesn't constitute building a stance.