Brian Schwind: personal growth? I stumbled across this because I am looking for a way to get an idea of how much I know/how much more I could know etc. I realise there are _many_ ways to do this (that are not necessarily mutually exclusive from one another) and I feel that, generally, certification is an ok way to go about it. Bear in mind that there are developers in all languages that will only touch 70% of the language in their day-to-day, and so it can be hard to find out what you don’t know.