What is a good Vocaloid song for inspiration?

Well, it all depends on what type of inspiration you need!

If your looking for some sad songs:

Daughter of white by Yowane Haku, or Uninstall by Yowane Haku.

But if your looking for some upbeat, unique cute songs:

Triple Baka by Hatsune Miku, Kasane Teto, and Akita Neru, and you could check out World is mine by Hatsune Miku.

If your looking for something sad, unique with a interesting storyline you should check out the Daughter of Evil series:

1.Servant of evil-Len Kagamine

2.Daughter of evil-Rin Kagamine

3.Daughter of white-Yowane Haku (Yeah, I know I just listed that!)

Hope I helped!

-Elissam7