I’ve been to many countries around the world and I would say that Japanese people are the most polite and civilized on earth. They Always leave me a very good impression. By the way, the reason you don’t look Japanese is because you have that outgoing and westernized vibe, maybe a little contrast to the stereotypical reserved and serious Japanese man
FYI, Malaysian are also Chinese. There are Malay natives and also Chinese who have migrated to Malaysia for few hundred years. like Zainichi Koreans in Japan
Japanese girls are usually smiley, facial expressions are always smile or nice vibe. Not very tall. Korean girls have super pale skin and skin quality is usually really good, but they always give off some cold and unfriendly vibe. As to Chinese, it’s difficult to generalize since the population is large and you get to encounter all different kinds of types.