Well, to raise a boring girlfriend in Saekano, you could start by communicating openly about her feelings. Also, plan surprise dates or outings to spice things up. Another thing is to support her in pursuing her passions.
Well, first, think about the personality traits you like. If you like the gentle and kind type, then Tamaki from 'Ouran High School Host Club' could be a great choice. He's always so sweet and caring towards others. In terms of looks, his princely appearance is a plus. But also consider the storylines they are in. Characters from more action - packed animes might have more exciting adventures that you can follow along with, which can add to the allure of having them as an 'anime boyfriend'.
I would choose Tamaki Suoh from 'Ouran High School Host Club'. He's so charming and kind - hearted. He always tries to make others happy, especially Haruhi. His goofy and flamboyant personality makes him really fun to be around. And he comes from a wealthy family, which doesn't hurt either. Plus, his journey of self - discovery throughout the series is really endearing.
One of the most popular anime boyfriends has to be Edward Elric from 'Fullmetal Alchemist'. He's got that tough exterior but a really kind heart. His journey to find the Philosopher's Stone and his relationship with his brother are really touching. He's also quite funny at times with his short - tempered nature. His red coat and blond hair are iconic looks that many fans love. And he's not afraid to stand up for what he believes in, which is a great quality.
You can try looking on popular light novel reading websites like NovelUpdates or Webnovel. Sometimes, they have the latest chapters available for free or for a subscription fee.