Wheatley is talkative and friendly. He frequently second guesses his own decisions and is not especially assertive. He is patient and, when his actions lead to unpleasant consequences, he is quick to take responsibility and apologize. He's generally not seen as very bright, or has very poorly thought out plans so he regularly gets called a moron. He's very sensitive about his intelegence and will get very agitated when people demean it or talk to him like he's stupid. He likes to stick to Chell's side, and you don't have to look far for one to find the other, he isn't bothered one bit by her standoffish attitude and is content to just sit and babble at her.