Peter is somewhat neurotic and awkwardly unsuccessful with women. He seems to dwell on the negative realities in the world, failing to enjoy life in the moment. His negativity is more subtle than aggressive. He's a good-hearted person. Peter is slightly anti-social. He likes playing video games and DVDs like Girls Gone Wild. Despite his negative traits he's still likeable and is rarely loud or obnoxious. He's a bit of a slob and paranoid about the unforeseen effects of the experiments. It's usually Peter that gets the short end of the stick. Peter has dreams of being rich but doesn't do anything to get there.

Ron is slightly more normal than Peter. He doesn't mind being a guinea pig as much as Peter does. He justifies his choice of occupation by deeming it a necessary service to society. He's better looking than his pal and slightly better with chicks. Most people would admire his loyalty and ethics. Like Peter, he strives for a better life. He's a little more aware of the real world than Peter is but he's still a total slacker and a tad naive. In the end he'll always do what's right, but it might take him a little time to figure it out.

He's loud, he's obnoxious and he's always looking for a scam to make a quick buck - even if it means selling out those closest to him. He's also Ron and Peter's best friend.

She's cute, spunky and probably the smartest person in the show. But Nugget and the boys always manage to drag her down to their level. She's like one of the boys, but with boobs.