Worst: You come NOW!, not as a QUESTION but as a COMMAND. And then repeated. I'd just say that EVERY time she says that, it makes it less likely and will take me longer. Definitely a "No repeat" indicator.

Best: Not on these shores, but one of my favorites was a PRC who'd say as she knew I was getting close: Give me your juice.

Or the Thai, who after banging away FS, I couldn't finish, so she ripped off the condom and stated sucking. I was just about to tell her to give up as it just wasn't going to happen, when suddenly it was, and did. She looked up, cum rivulets running out of each side of her mouth, a BIG grin, saying, "Oh, you didn't tell me you wanted to cum in my mouth." A real PSE moment.