FYI: 17 years into my career, still trying to become an expert at something! While I've still got stuff to learn, and still need to get better at things, the effort/process/learnings all take me to wonderful places and meeting with great people. Attitude and aptitude are key!
I'd like to add appetite as well - or passion, as you wish :) But I can concur on the blogging - it shows your engagement, capabilities and of course it's good practice for yourself as well!
