I couldn't remember when I started using D, so I had to go dig in my personal diary entries until I found it...
In late 2011, I had already heard of D during my search for something better than C++, but I didn't really start seriously using D until by chance I came across Andrei's TDPL at a local bookstore. That got me *really* started. Apparently my first D program was a brute-force search to discover all augmentations of a certain class of 4D shapes called duoprisms. I had a very pleasant experience with it... and as they say, the rest is history. :P --T
