Guild Wars 2 fan, you might want to check out the transcript of a recent Reddit session that features most of ArenaNet's programming team. Technical Director Cameron Dunn, Engine Programming Team Lead Chad Taylor, and Gameplay Programming Team Lead Braeden Shosa are just a few of the folks on hand answering in Reddit's signature ask-me-anything format.
"It's worth pointing out upfront that we're programmers, not designers," ArenaNet's intro says. "So if you want to know why your favorite skill was changed or when you should sell all of your hoarded butter to maximize gold return, we probably won't be able to help."
[Thanks to pcgneurotic for the tip!]