Leonard Boyarsky, lead world artist on Blizzard's just-annouced Diablo III, is a veteran RPG developer.
He was one of the original leads on Black Isle Studios' Fallout, and contributed to Fallout II. Before that title's release, he co-founded Troika Games with fellow Fallout creators Tim Cain and Jason Anderson; the trio designed Arcanum: Of Steamworks & Magick Obscura and Boyarsky led Vampire: The Masquerade - Bloodlines.
In 2005, Troika closed its doors, and Boyarsky landed at Blizzard. He sat down for a chat with Gamasutra to discuss why some ideas that look great on paper won't work in a game - and vice versa - and why he doesn't think Blizzard will focus heavily on a single-player experience any time soon.