I spend three short minutes browsing this site and all I see are Pony re-colors, Sonic re-colors, and Vocaloid fan-characters that look exactly like the original.
why do i still linger around here omg.
I also see "original" characters that look exactly like Miku all the dang time ugh Lord give me strength not to ahgjfd
[UPDATE]
I hate Vocaloid fan-characters.
HATSUNE MIKA? Seriously...?
The purpose of Vocaloids are for them to be used as musical tools, therefore it is irrelevant to make a fan character in the first place (this excludes people that actually program new vocals. And no, adjusting the pitch doesn't count...).
However, remember that if you comment on somebody's UC, be polite and subtle. Don't address it so assertively at first, so they won't view you as a troll. Please be polite! <33