Philip Jackson who writes a web comic I sometimes read posted up an interview, with this tidbit, and some decent advice on webcomic making
People seem to like the SA cast because they can see a bit of themselves in the characters. I get a lot of emails from people saying they’re just like Scarlet or Pip! I think the more a set of characters act like a person would in the real world, be they facing day-to-day drama or crazy sci-fi peril, the more readers warm to them. That in mind, I try to ensure the SA cast make logical decisions, even when facing illogical situations.