The desire to give a talk is because public speaking is something I want to be better at, because sometimes I've had opportunities where I could have talked about something but didn't feel confident enough due to lack of experience. Also, my employer would like me to give talks, but again, I don't feel confident enough to do so. At some point you just have to take the plunge and I'd rather do it at a generally friendly tech conference talking about something I'm interested in, before I do this in a more hostile environment. Maybe that's too selfish a way to look at conference talks...