The Big Bang Theoryis a show that's had an immensely successful run, lasting for 12 seasons over 12 years and even spawning multiple spinoffs like Young Sheldonand Georgie and Mandy's First Marriage. On the other hand, it's been the subject of much debate, even becoming the subject of a lawsuit due to one joke. But most of The Big Bang Theory debate revolves around the characters, specifically the four core characters of the ensemble: Leonard Hofstadter (Johnny Galecki), Sheldon Cooper (Jim Parsons), Howard Wolowitz (Simon Helberg), and Raj Koothrappali (Kunal Nayyar). Why the debate? Because of all these characters, Raj is the only one that the series never really knew what to do with.