What I like about Miku (and all the vocaloids) is that they are the avatar, the embodiment of all those who put their heart and work into her songs, videos, art, etc. Rather than some bratty teen pop idol getting all the fame while the people who actually do everything remain in the background.
Meh, Miku's okay in a sense.
It's not that I don't really like her, it's just I get tired of hearing her chopped up voice samples horribly forced throughout a song's melody in most amerature compositions utilizing her program. Not to mention the generic Miku cosplayers that overload cons. It's quite lame. Either way, I live Vocaloid and Miku. I'd just prefer the more realistic-sounding entities such as Gumi and whatnot.
But Miku is so cute. Defiantly on of my favorites. Gakupo, adore him! Rin and Len are kinda too popular in my opinion, overrated but it doesn't take away the fact that I do love them. I have a Kaito shirt, a Rin/Len shirt, a Luka and a Miku one. And a Kaito doll, and a poster that has the same figures as my shirt, plus Meiko who I don't care for.
I also love the new Spanish vocaloids, and Oliver is such a cutie. XD