I used to be completely blasé about it, with all the concerts and plays that I was in as a kid. Stage fright was completely unknown - it's almost boring just doing your routine act/dance/sing/speak/play etc yet again after so many rehearsals. Once I started school and they made you Give A Talk on stuff, I learned to hate and fear it. Maybe because I never actually made myself a written speech and practiced it, just made some crappy prompt cards and even worse OHP sheets. Oh, actually, in foreign (Spanish/French/German lessons) it's fine because everyone is rooting for you and doing their best to help, and all my worries are that I'm getting the vocab and pronunciation correct, rather than if I'm actually doing well as a speaker.