I had planned to do an episode of Firefly with Amy and Alexis and James Marsters as part of a travelling Shakespeare troupe. Because it’s sort of a staple of the John Ford Westerns, there’s always that over-the-top theatre guy. And I thought it would be terrific to have them to try and put on a play in the cargo bay.
Joss Whedon in conversation with Total Film (X)

When talking about Buffy creator Whedon, Marsters fondly referred to the man as a “true artist,” though he recalled one encounter in particular that made him realize that even the most talented of artists suffer their creations. “I asked him one time, ‘It must be wonderful to wind up the universe and just see how it plays out,’ and he was sweating. He was like, ‘Yeah, the problem is I have to keep winding.’ He was really killing himself to put the show out, and basically do a 48-hour movie every week, and so I got to see him under intense pressure.”

"He’s a genius," Marsters concluded, "so it’s like, some days you’ll get a huge amount of love, and some days you want to hide from him."

James on Joss (X)