Massively late member is late. ٩(ยดД` )۶
My favourite Vocaloid is Kaito. He's so awesome when people use him properly! I love his cover on YouTube for 'I'm sorry I'm sorry' (gomen ne, gomen ne). He rocked that song so much better than any of the others...^^ I'm very fond of all the Vocaloids really. I don't hate any of them! Miku is an angel, Rin and Len are those spunky little teens than can be devious devils or cheerful innocents, Luka is a mature yet young rockin' lady, and Meiko is that motherly drunkard of a goddess~~~<3 I kinda ship them all in a family setting, hahaha. Gackt was my god after I discovered his music through Final Fantasy VII: Dirge of Cerberus - so naturally Gakupo is ****ing awesome to me, and Gumi has a very nice edge to her voice.... Needless to say I enjoy all Vocaloids! Moving on.
When it comes to romantic pairs; I will out and say that Kaito is an uke in my book, Len is a seme and Gakupo also classifies as a seme. No offense Uke!Len lovers but... Shota is too pedo for me, and my headcanon is that Kaito is too shy and too 'kindly big bro' for that shit...
I ship Gakupo x Kaito and Master x Kaito hardest, though I'm not averse to Len x Kaito, as well as Len x Miku, Luka x Miku, Len as seme over pretty much all of them... I SHIP A LOT