Luffy: Would absolutely cling to you every time he saw you, would always steal your food secretly until he got caught and scolded but then he would pout about it and steal more. He tries to ask about things you like, wanting to remember about your favorite stuff but he would always forget then Nami or literally anyone in the crew would remind him. He sleeps with you, like a teddy bear. He will not let go of you, no matter what. he does move around A LOT in his sleep so he would normally end up with his foot in your face or even off the bed that you share. He is very serious about what happens to you. He does let you wear his straw hat if you really wanted, just don't break or ruin it on purpose his trust for you would slowly lower as he felt betrayed but try to hide it.
Zoro: He isn't the lovely dovey type, but once in a while from Nami, he would sometimes remember to give you stuff, even if it was as simple as compliments, a small gift, bought or handmade. He will not be touchy in public unless he is jealous, but he finds it too embarrassing to be so clingy in public but he is a sucker for cuddles with you alone. He always loves when you watch him train, it makes him feel stronger and more appreciative. He adores your flustered face. He can't help but let out a little little tiny smile poke out when he sees your fighting( when it's not serious, such as a small amount of marines.) He hates seeing you hurt, if he knows who hurt you, he won't hesitate to slice them open and watch them suffer.
Sanji: He hated admitting he fell in love with a boy, but he had this bisexual phase in his teenage ages and it came back just for you. He was more touchy and sweet in private when you first starting dating, due to being kinda of embarrassed to date a guy. But then he starting embracing it, treating you like Nami and Robin. He always found himself feeling guilty when he flirted with a girl in front of you, remembering that you were his, not this random...pretty...girl. But you were so much better! He loves cooking for you, treating, and pampering you. He adores you with his whole soul, heart body and mind. He is a sucker for cuddles, he always ends up in Chopper's office with a huge nose bleed when you do anything cute or sexy. He actually almost died from blood loss when he first saw you in the shower. He hates when people flirt with you, he will round house their ass across the world to keep them away from you.
Usopp: Always flustere with you, even if you were the bottom(which is highly unlikely to me since Usopp is a power bottom in my eyes) He will no matter what be embarrassed, flustered around you. He tries to make up lies to make you feel better or happier when you down, such as telling you about his awesome adventures that were funny. He loves your laugh and smile so much. He is always clinging to you, Nami or Zoro when he is scared, mostly you. He finds your recklessness annoying, but brave. He makes you gadgets for your birthday, one of them was a metal rose bursting into a huge heart in your hands. He loved your reaction to his hard work.
Trafalgar Law: hates being interrupted during work, he was about to scold the person who disturbed his working hours until he only sighed and rolled his eyes when he saw you enter. He hated physical touch in public, but slowly...very slowly got used to you being affectionate to him. When you make him flustered, he hides his face with his hat. He sometimes gives you random check ups to make sure your okay with your mentality and physicality. He hates when you step into fights to protect him, he would drown himself with guilt if you died in his own fight. He enjoys you sitting on his lap when he is working quietly, appreciates when you clean his office or room randomly. He haves nose bleeds when you try to do something sexy for him.
Eustass Kid: Very cocky man. You tell him you love him? Would slightly be flustered but immediately hide it then smirk and say "I know, who wouldn't love me?" In a cocky tone. Hates physical touch. He tries to not get angry at you but he always does, he would never hit you though, but he normally always snaps at you and yells at you. Gets jealous really easily, shows his possession. Someone flirting with you? He punches them then picks you up and takes you to his room for himself. Shows you off like a rare prize. Loves when you try to please him, will absolutely bruise you up when you guys do it in bed, he is always rough.
Shanks: Is super clingy with you. Hate to say it, but he would never let you go out in sea, he is very protective of you, he would never let you get hurt. If you became a pirate, he would try to get you into the normal life and quit. He hates if you are in danger. But if you were in his crew, you were safe and sound with him protecting you, but it will still eat him alive if something bad happened to you, especially when he is a strong pirate who gets into fights everyday. He Appreciates when you roll up and tie his left sleeve to his shirts in the morning. He can't grab something since he is holding something in his right hand? Will act helpless and ask you to get it for him. Drinks all day, you or Benn always end up taking care of him. He flirts with you a lot, especially drunk.