"Never anything bad," Zuko agreed with an amused sort of snort. "And yes, running off and getting married was rather a busy steal of time. I'm afraid I can't say I regret it though." Smug. Smug. More smug. Zuko probably needed more practice playing well with others, to be honest.
"You should come over more," he said, and it was sort of like him making effort. "I think Draco does well in collaborating musically. I'm not much of a help with that, personally." No really, playing the duduk didn't seem to count.