If you want to search them, go here : http://nicosound.anyap.info/

Oh thanks Leo!!!

btw why are there always leeks in Miku's songs ? What is up with that?? XDDD

Dunno, ask Fastspeedy for more details X3

I love the "twins"
http://www.youtube.com/watch?v=IRvpihDDx4A
I have an odd soft spot for this song

Epic XD

I think this the first vocaloid song I've heard that has violins hehe

I LOVE Meltdown!! x3 and I also like http://www.youtube.com/watch?v=ZOXCeEztMGc <3

Ohhh Love is War is the first vocaloid song I ever heard. It's a classic XD

Hoh. Meltdown was the first Vocaloid song I heard, along with Miku's "World is Mine". I was so hooked on it :D

My personal favorite might just be "Akujiki Musume Conchita" http://www.youtube.com/watch?v=Iyw6.....eature=related (and it's rearrange http://www.youtube.com/watch?v=Pow-Xy5wJcM).
I find "Magnet" (and its "Nico Nico Chorus" covers) by Megurine Luka & Hatsune Miku good too. Oh, and then there is Kaito's "Haihahaini", Gackpoid's "In the Name of God", Rin & Len's "Gekokujou" and "Dance Site of Darkness"/"Yami no Dansu Saito", Kaito's, Len's and Gakupo's "From the Sandplay Singing of the Dragon" and "Imitation Black", Megurine Luka's "RIP=RELEASE" ... it's too hard to pick just one : / honestly, I'm such a vocaloid junkie nowadays. I swear I'm not usually this much of a weeaboo.

Personal favorite of mine:

http://www.youtube.com/watch?v=Zyi6_agw-yA