The Excelsior Acquisition - S3-E16
Trivia: Raj's question about why so many of Stan Lee's characters' first and last names begin with the same initial (Peter Parker, Reed Richards, Bruce Banner, etc.) has been answered by Lee in interviews before: He has a bad memory for names, so if he can remember one of their names, he knows the other starts with the same letter.
The Excelsior Acquisition - S3-E16
Trivia: The judge at the courthouse is named J. Kirby. Jack Kirby was a Marvel comics artist who partnered with Stan Lee, who also appears in this episode, to create The Fantastic Four, The Incredible Hulk, and many other Marvel comics.
Chosen answer: It does. The variable cleanliness of the cab and the habit of taxi drivers to engage customers in small talk would be too much for Sheldon to handle, and not an option for him.
Captain Defenestrator