Quote from Pikablu;216417:
Meh, Vocaloid is okay. It's like one of those things that the fans end up ruining for everyone else.
lolthis.
As for why its popular, completely uneducated blindly following weeaboos, and the fact Japan has a huge culture jump even if you are a geek who spends time on the internet, it's still a huge gap, so naturally most people won't be pulled towards it.
Personally I like it just because of the amount of work and complications on working this, in short just me being enamored by the raw ability of technology and work now days.
However, I mostly prefer the instrumentals to vocals, as much as this is slowly changing each day, I still prefer them more over vocals.