I did a DA game briefly before the group drifted apart. We got three sessions in, with the HPG network going dark at the end of the second one. I was overall pretty pleased with my characters, since there was a lot of intrigue and politicking going on. My group consisted of: a young, very much pro-Republic Mechwarrior, her older sister who was a business woman with several dark secrets, a ComStar diplomat and (originally) a BA trooper. The BA trooper got killed in the third session and his replacement character concept was "Paris Hilton in the 32nd century...except from the Draconis Combine".
Only one player had read anything about DA (the Mechwarrior) and one other had at least a passing familiarity with the universe (the ComStar diplomat).