What is wrong with Gary Busey?
https://www.quora.com/What-is-wrong-with-Gary-Busey/answer/Jon-Mixon-1
Gary Busey is:
Suffering from medical conditions brought on by his 1991 motorcycle accident and what was apparently nearly two decades of substance abuse - Basically he has physical and organic brain damage and that’s why he “acts” in the manner that he does.share
Suffering from one or more mental illnesses - Although Busey seems to be able to moderate his conditions sufficiently to remember script lines and to be able to sign deals, he also experiences problems with behavior control and judgment that make him appear to be unstable.
Acting his “shtick” - Gary Busey was fortunate to be involved in the commercial and critical success that was The Buddy Holly Story. However following that success, he began to be used in character, rather than leading, roles. For those roles (such as his turn as a mercenary in the first Lethal Weapon film) he needed to be “deranged” and Busey was able to inhabit that character. Following that, although he had “normal” roles (Point Break, etc) even those roles had an “edge” to them. Basically Busey acts the same way in the majority of roles that he is and that’s become his “trademark”.
There are a combination of things “wrong” with Gary Busey; however none of them apparently prevent him from obtaining some acting roles and from signing contracts to be paid for them.