Just something I noticed in the manga that I’ve read so far between dark and light hair guy characters… the guy with dark hair is usually more serious, earnest, and studious, while the guy with light hair is more carefree, funny, and somewhat of a playboy. It’s probably due to the typical Japanese image (reserved) vs. the typical Western image (boisterous). Personally, I prefer the dark-haired guy in the manga. Another thing that I noticed is that if there’s a love triangle involving both guys with dark and light hair, it seems like the main girl character ends up the dark-haired guy. Even when the dark-haired guy is the happy-go-lucky one, he gets the girl. But not always though, and there are times when the light-haired guy gets the girl, too.