If you liked
Kiniro no Corda: Primo Passo
|
...then you might like
Uta no☆Prince-sama♪ Maji Love 1000%
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Both have a reverse harem structure, where the sweet, "natural" girl is surrounded by very talented, very good-looking men. Both focus on music, with Primo Passo featuring more classical music, and Uta Pri featuring pop music. Neither one has a very great plot structure - you won't be surprised by anything that happens, and the obstacles encountered by the protagonists are overcome fairly easily.
If you liked
Soul Eater
|
...then you might like
Durarara!!
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Both have a bit of a darker atmosphere, good action & fight scenes, and engaging characters. Both possess elements of the supernatural (Soul Eater obviously more so than Durarara). Both have well-crafted plot structures.
If you liked
Kiniro no Corda: Primo Passo
|
...then you might like
Special A
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They both have a strong female character, surrounded by good-looking, extremely talented male characters. Both have a light-hearted, romantic feel - the story line never gets too deep, but they are both enjoyable to watch.
If you liked
Code Geass: Hangyaku no Lelouch
|
...then you might like
Mirai Nikki (TV)
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Both quite dark at times, both action packed, both have engaging lead characters who are very bright but come across as wimpy occasionally. Both make you think as you watch, and are suspenseful and engaging.