The worst thing is when you're a little cute when you're annoyed but Yondu knows better to push his luck. It's more just a general feel that makes the difference. Something about the emotional depth to their interactions. A desire for peace versus an encouragement to fight. He snorts a small laugh and looks down.

"I dunno. I been nothin' but sentimental all night, I guess it got me feelin' feisty." Sentiment is a drug that occasionally needs washing down with wry humor.