2013 I guess. It's the year I jumped on the IT train. As a unix/linux sysadmin in a worldwide bank, been there for over 3 years. It was an amazing experience. Used a lot of my knowledge and learned even more. Got a chance to play around with enterprise software and hardware [remotely], deal with various vendors, have business with folks from all around the globe, learn enterprise processes, incident handling, be the initiator of automation of our processes,...

Boy it was an amazing year. In both professional and personal lives :)