James Salt, Lead Designer for Battlefield Heroes, talks about the character classes, the 3rd person camera and the lowest system specification that they currently support:
"When I joined the team we started talking about what character classes we wanted. In previous Battlefield games you were a soldier who picked up a kit and assumed that role. For Heroes we wanted to take a different slant on that idea. We wanted you to own your Hero. First up, we started by thinking of all the heroic characters from old war movies, and what kind of things made them unique. After a couple of days trapped in a meeting room, we came up with these:"
For a free game, this looks pretty cool.