"Yes?" The Master chuckled, lifting one hand palm up. "I want to protect what's mine, and I can't always do that. And I can't summon up the enthusiasm I normally have for taking over the universe." He paused.
"I'll cheerfully wring the Doctor's neck if I run into him, but beyond that..." He shook his head. "It almost feels pointless. No audience to show off for, no one to give a damn if I succeed or fail. Even the Doctor doesn't seem to care, so long as I don't interfere with his gallivanting."