But they have all those things, goals, desires, fears, motivation, physical appearance, social behavior and psychology. None of them lack any of that, look at Urianger, the way he pours and ponders over the risks, multiple outcomes and ethics of everything they do. Look at Thancred who grew up on the streets and still struggles with fears of returning back to that kind of life and the guilt of not being able to protect someone who was apart of him coming out of that. All of these characters have been around for so long I think it's easy for people to forget their complexities because there is constant threat and crises occurring pushing them to take action, it doesn't mean they are bad or lacking "3 dimension"...