Regis reuniting with Geralt in Blood and Wine after all these years is one of the best moments if not THE best moment in The Witcher 3.
I can't believe this guy was last seen in The Lady of the Lake in 1999. Geralt thought he was dead.
The writing in this sequence is so good; 30 minutes of cutscenes, 10 minutes of gameplay, IMO this is where the expansion truly takes off.