He loves it when
Liam: You do twitcams with him or just by yourself, because it shows you do appreciate the fans just as much as he does.
Harry: You wear his clothes, he thinks its adorable how big they are one you. And he finds it really hot.
Niall: Your not always a healthy eater, you'll eat junk food or unhealthy food whenever you feel like it and Niall loves that, because it keeps him from having to eat healthy.
Zayn: You get tattoos, because he loves to learn all the new meanings and open up more doors of your past. Plus he loves how bad ass they make you look.
Louis: You pull pranks or start a prank war with him, because it leaves him on his toes and he loves how happy it makes you when one of your plans work.