Liam: Liam wasn't too big on PDA. He wasn't because he felt like he didn't have to show you off or dry hump you in public :)
Niall: Niall was BIG on PDA. He liked to show you off let people know that you're all his. :)
Zayn: Zayn was pretty average on PDA. He would give a little kiss on the cheek every now and then.
Harry: Harry liked PDA a lot too. He felt that he didn't have to show you off but every now and then their would be a picture of you and Harry making out on a magazine.
Louis: Louis wasn't very huge on PDA but he still liked it. He wouldn't make out with you in public. But he would hold your hand or kiss your cheek a lot. :)