There's a Star Wars: The Old Republic Q&A on GameSpot discussing the Sith Warrior class in BioWare's upcoming MMORPG set a long time ago in a galaxy far, far away. Since this is the class Darth Vader would fall into it's easy to imagine this will be a popular choice. Here's a bit on the topic from BioWare's James Ohlen: "At E3, we did show off a Sith, and today, we are revealing that the Sith that was shown at E3 was specifically the Sith Warrior. Darth Vader was the primary inspiration for the this character class. The Sith Warrior is a heavily armored Force user driven by darkness and rage. He depends more on overpowering his opponents with martial skills than Force powers but often uses iconic powers, such as [the] Force choke. His story revolves around hunting down and crushing the enemies of the Empire, though sometimes, he is given the task of corrupting--rather than destroying--an enemy."