User blog comment:Tsumou/Creating VOCALOID Music. Who is best to use?/@comment-5169986-20140810004356

So from Crypton 


 * Miku - Dark and Sweet


 * Meiko - whisper and dark


 * Kaito - soft and whisper

From Internet Co.


 * Gumi - sweet or whisper


 * Gackpoid - whisper
 * Kokone

Other companies 

*Mew

*Avanna (if you're wanting to going for English later.)

*Yohioloid is good for ballads he has a Jap + Eng voicebank so if gives you an option for English songs.

*Maika

*Yuzuki Yukari, it's said she's hard to use