“Buzz, like many char­ac­ters in Toy Sto­ry, is a com­pli­cat­ed one, who feels gen­uine emo­tions such as pride, anger, depres­sion, and sad­ness, much like a reg­u­lar human. These are traits which he shares with his best friend, Woody, how­ev­er, one would say that Buzz is bet­ter at keep­ing his emo­tions in check than the cow­boy. Buzz is known for his brav­ery and courage with a by the book mind­set, believ­ing the way peo­ple should live their life by the fol­low­ing rules; though there are rare moments when he will bend the rules or tell a cov­er sto­ry if need­ed to when he knows it is the right thing to do.”

Source: http://disney.wikia.com/wiki/Buzz_Lightyear