I'm happy to say that I am increasing my intensity level every week. What I am able to push to this week wouldn't have happened two months ago, etc. I am getting used to the mental pain and am able to go a bit beyond as time goes on. I'm sure there is an upper limit but I'm working on finding it.

The two biggest areas for me are squats and dumbell presses of any kind. The kind where if you fail you don't have a bar coming down on you so there is no excuse not to go for another rep. Several times already I've "gone for another rep" when I used to have been done and gotten it and then gotten another. I feel this is where real growth occurs.