The preparation doesn't bother me too much. When I was a kid though I would worry well ahead about how I was going to react in front of the audience and would get more nervous the closer it got. I delivered like crap :D

These days, I have no issues delivering in front of crowds, I just don't like it so much as I don't search for the spotlight. Generally, I deliver better than most, so it isn't really an issue professionally, but I would have liked to have develeoped the skills much younger than I did.