Nodame Cantabile, Chihayafuru Recommendations
While Nodame Cantabile is about classical music and Chihayafuru is about karuta, both of them revolve around people following a passion most people would find odd nowadays. They are a bit slow paced, but feature very solid character development. Chihayafuru doesn't have the same amount of romance as Nodame Cantabile does, but it's there. And the female leads are just as clueless.
Both series are about girls who enjoy more niche hobbies, and both have the same silly, energetic feeling to their stories. They're both serious about their hobbies, though it's portrayed in a fun, goofy way. Lovable main characters for the most part, though Chihayafuru doesn't quite have the romance that Nodame Cantabile does.
Both are about young people working hard and striving for their dreams.
Both protagonists are airheads yet extremely talented (in piano and karuta).
Anyone with a strong aspiration of their own will be able to relate to this anime.