I’ve never heard of Rooster Teeth and it’s a shame because they’re pretty amazing. A good friend from college sent me a link on my FaceBook wall of the red trailer, saying he’d like to see my sketches be animated similar to RT’s work. But RT’s work makes mine look like a toddler’s doodles – you’d put them up on a fridge and feel proud, but not because of of how good they are.
I don’t know much about the back stories of each character, but there’s a fan wiki up. It’s a good read, check it out.