i do this a lot at twitch.tv/mdmnk (less so recently due to losing a job and moving to a new state, then getting a new job and once again moving to a new state).

It was stressful at first... had to deal with trolls (and also about 80% sure hackers that were trying to get me to root my system live). After I got the hang of it all though it became a lot of fun.

I stream game development which is a hobby of mine (software engineer for the interwebs by day). Being that it is a hobby I am still learning. I've been able to make some internet friends, pick up techniques and learn more about C# thanks to twitch streaming. One day I would absolutely love to transition to full-time independent game development and do it all live on Twitch.

Another thing to note - although I have 14 years of professional experience, I used to get nervous coding in front of people, thanks to streaming on Twitch that went away -- I'm no longer afraid to fail or mistype. My overall confidence has improved. I strongly recommend live coding.

edit: I've also gotten MUCH better at talking through my code because to maintain an audience on twitch you have to talk and explain what you're doing almost the entire time.