"The word for that's observant," Midnighter says, but he's still smiling. "I'm observant, too."

But he doesn't share what he's observed.

"You're saying you have a taste for weirdos? Not that I'm complaining." He'd better gauge exactly what John's level of interest is, here, because he knows what he wants it to be, and... if he's being particularly candid with himself, he hates rejection.