Late last night Ivan Kirigin (founder of Tipjoy, now at Facebook) asked via Twitter why I still code. My tweeted answer was that I really enjoy it. On the train into NY this morning I have been thinking more about why that is and have come up with a bunch of reasons:First, I discovered coding in the formative teenage years and at that time got deeply into it. I had the great luck that at age 15 a neighbor who was studying “Informatik” (Computer Science in German) took to mentoring me and givi...