breast feeding help; is it helpful?

So I get paid well to do what I love! I am very blessed. I have always supported breast feeding, and I am very comfortable with new moms. But I often wonder if I over-help. Sure first time moms need someone to show them how to get a good latch and teach them about breast care, and diaper counts. But, is there something to be said for letting them figure it out? I had a lovely nurse with my first child who left me shocked but properly latched when she grabbed my breast and popped it in my sons mouth. It was wonderful that he was nursing but the next time he was hungry I still didn't know what I was doing. It goes against my nature to sit back and watch a new mom struggle, so I try to balance instruction and stepping back for a few moments. What are your experiences? did you have a helpful nurse? did you know what to do when you got home? Did your nurse ask for your permission before grabbing your boob?!?!?! (I always do, and have never been told no) Would you feel comfortable telling your nurse you didn't want to be touched?