Monkey D luffy

Monkey D. Luffy from One Piece has a childlike personality:
Extremes
Luffy can be extremely greedy or selfless. He can be greedy for food, adventure, and his crew. He can be selfless, even sacrificing himself to protect his friends and family.
Spontaneous
Luffy loves to eat, party, and goof around. He's quick to get involved in dangerous situations.
Optimistic
Luffy is optimistic and generally good-hearted. He's willing to risk his life to become King of the Pirates.
Ambitious
Luffy is profoundly ambitious and frequently declares he will become the Pirate King.
Other aspects of Luffy's personality include:
He's witty, humorous, and silly
He's a pure heart who easily wins over his crew's loyalty
He's often quick to get involved with scenarios other crew members find dangerous
He's known for his signature straw hat and elastic limbs
He's a super cheerful guy, full of joy
He barely cares about his own health and safety

Further information: Monkey D. Luffy/Gallery
Luffy is a young man of average height with shaggy black hair, round black eyes, and a slim muscular build. He is renowned for his trademark straw hat (from which he gets his nickname "Straw Hat Luffy"), which was lent to him when he was young by the legendary pirate captain, "Red-Haired" Shanks,[35] who in turn received it from Gol D. Roger.[43] He wears blue shorts with cuffs, sandals, and a sleeveless red vest. Luffy also has a scar with two stitches underneath his left eye, which he earned as a child by stabbing his face to show Shanks that he was tough enough to be a pirate.[44] He was severely wounded by Akainu in the Summit War of Marineford,[45] leaving a large X-shaped scar on his chest.[46]

One Piece series:
Rubber body
Luffy's body is made of rubber, giving him the ability to stretch and attack long distances. This makes him immune to electric attacks and most blunt forces.
Gum-Gum Techniques
Luffy has developed a wide range of combat techniques and attacks that make use of his rubbery abilities.
Gears
Luffy can manipulate his rubbery body into various forms, which he calls “Gears”. He has managed to unlock up to five gear forms, and his fifth gear is known to be his peak form.Red Hawk technique
Luffy activates Gear 2, then uses his Armament Haki to coat his arm as he prepares for a standard Jet Pistol attack. This ignites his arm into flames, improving the strength and power of the attack.
Bounceman
Uses elasticity that comes from the heavy contraction of rubber due to Haki. This allows Luffy to launch attacks carrying great power and to fly.
Luffy's rubber attributes are a result of him eating a devil fruit called the Gum-Gum Fruit. He is one of the Four Emperors, and at the young age of 19, he is one of the four most powerful pirates in the world.

In One Piece, Monkey D. Luffy dislikes many things, including:
Weak people
Luffy dislikes weak people, even if not in a physical sense. For example, he told Koby that he "hates people like him" because of Koby's cowardly nature.
The Blackbeard Pirates
Luffy strongly dislikes the Blackbeard Pirates, especially their Admiral Blackbeard. He blames Blackbeard for Ace's death.
Akainu
Luffy hates Akainu because he killed Luffy's brother, Portgas D. Ace.
Celestial Dragons
Luffy was infuriated when a Celestial Dragon shot Hachi during the Sabaody Archipelago arc.
Other things that Luffy hates include: Croc, Marshall D, Higuma.
Luffy also doesn't distinguish between pirates or marines, and only perceives an individual as good or bad. He believes others easily, but is never naive enough to be taken advantage of.

In One Piece, Monkey D. Luffy likes many things, including:
Adventure
Luffy loves adventure and believes that the Pirate King has the most freedom in the world.
His crew
Luffy's love for his crew, known as his "nakama", is a driving force behind his success.
Meat
Luffy's favorite food is all kinds of meat.
His optimism
Luffy is optimistic and good-hearted, and often demonstrates more understanding than other characters.
Other things that Luffy likes include:
Becoming the Pirate King
The freedom to travel anywhere on the ocean
His crew's love and support
Boa Hancock
Risking his life to become King of the Pirates
Luffy has no love interests in the manga or the anime. However, he has made strong bonds with numerous women, including: Alvida, Hancock, Rebecca, Shirahoshi.