Actor-Shared Background: Some of Bond's demons parallel Brosnan's: Bond lost his wife in On Her Majesty's Secret Service; Brosnan lost his wife to cancer). Bond alludes to this in GoldenEye and The World Is Not Enough, without making a big point of it.
Tuckerization: Jack Wade is named after uncredited screenwriter Kevin Wade.
What Could Have Been: Alan Rickman turned down the role of Alec Trevalyen. There was also talk of Anthony Hopkins playing role, with Trevelayan originally intended as having been a mentor/father figure to Bond rather than an equal.
A subversion from a previous example. Pierce Brosnan was originally chosen to replace Roger Moore as James Bond but wasn't able to get out of his Remington Steele contract leading to Timothy Dalton getting the part.