30 - your definitely not a teenager anymore. Might even be time to buy a motorbike and have an early midlife crisis. This is also about the time you realize that professionals don't seem that mysterious anymore and that being a professional isn't all that mysterious anymore as well. Early twenties, you were amazed at what those so called professionals were capable of, but nowadays, that youthful wonder has vanished and the magic of it all is lost. Things are just the way they are. Whether you are a professional or not, you know that there's still soooooo much more to learn that you actually don't really consider yourself all that professional, while those twenty-something'ers look at you with those amazed eyes - the skillzzzz!
At least, so I've been told.