Zayn: He loves kissing you in front of cameras and paparazzi, even though he's normally shy he loves showing the world that your his and he's yours, he wants everyone to know.
Niall: He loves catching you off guard, you'll be reading a book or just watching television and he'll just lean over and kiss you, very spontaneous.
Liam: He'll try to only kiss you in private when you two are out of the spotlights and paparazzi. He doesn't like a ton of PDA, although the occasional kiss is caught on camera and it makes the fandom go wild.
Louis: He loves to kiss you when you're midsentence. If you're talking for a long time and he starts to get a little bored, he'll just lean in and kiss you. You'd be annoyed, but, really who could be mad at a face like that? His kisses almost always make you lose your train of thought.
Harry: He loves waiting for a romantic setting especially. Much to your enjoyment, he's a sucker for the very stereotypical romantic kisses in the rain or kisses while watching the sunset.