The 100 Preference

PDA

Clarke: she is not really into PDA and thinks that letting everyone see that you two are together might put you in danger with her enemies. She waits to be alone to show you that she loves you.

Bellamy: he is big on PDA, wants everyone to know that you are his and they should mind their own business. Sometimes it bothers you, especially when you are in a meeting, but thet you just brush it off and go on with your day.

Octavia: she is more subtle than her brother, she just likes to hold hands and stay close. Usually you two are tuching somehow, if not with your hands then your legs are brushing against each other's.

Raven: she doesn't do it often, just once in a while a passionate kiss. It always takes you by surprise and she loves the blush creeping up your cheeks. She also puts her arm around your shoulders if she sees someone looking at you for too long.

Murphy: he always needs to be touching you somehow. It is usually a hand around the wais or the shoulders, unless someone is looking at you for too long, in which case he kisses you. He is not used to being the first choice, so of course when he has someone that chose him he is going to be all over them.

Finn: he is not really into physical PDA, but he openly flirts with you all the time and is always telling you cheeky pick up lines. He likes that others can hear that you are taken

Jasper: he isn't into PDA, it gives him anxiety to display affection in pubblic, so he'll only go as far as holding your hand if he is sure that people cannot see it, for examble under the tables.

Monty: he is very fond of subtle PDA, like playing with your hair, holding your hand or having his arm losely around your waist. He is really not into grand gestures, they make him feel uncomfortable and stared at. 

Lexa: she is not into PDA at all. She is really loving in private, but she has lost too many people to show any sign of loving someone to her people and her eneimes. Her main goal is to keep you safe, which means that she will not make you a target of those who want to overthrow her.

Luna: for her it really depends where you guys are and who is around you. If you are with people you trust or in a place where you are not threatened she is more easy going and touchy, while if she feels like you guys might be in danger, she is closed off and on her guard.

Lincoln: he can be into PDA, especially after a long day, when he needs to be in contact with you and doesn't care who is around.

Echo: she is not into PDA, unless someone is staring at you for a second too long. She likes to make sure that those who might have an interest in you know that you are taken and that she is not willing to give you up.