I haven't seen D-Gray Man, but judging by the pics I googled, I'd say.... Allen!

Kyoya or Tamaki? (Ouran Host Club)

Haven't watched Ouran Host Club...but i think Kyoya is cuter =]
Aidou or Akatsuki? (Vamprie Knight)

Aidou ))

Rima or Ruka? (Vampire Knight)

RIMAAAAAAAAA!!!!!!!! I love her!!! I'm gonna do an audition for her in a vampire knight sim serie

Nyu or Yuka (Elfen Lied) ? (I HATE YUKA!!)

Nyu :]

Shinigami or Mello ~ (Death Note) ?

Shinigami!!!!!!!!!!! I love Shinigamis!!

Ryuk or Rem? (Death Note)

Ryuk, I HATE Rem!!!!!!!!!!!! He killed L!!!!

Zero or Ichiro (Vampire Knight) ?

ZERO, of course!! ^^ (love ur avi pinkykitty)

Freya or Chii? (Chobits)

I didn't see the part with Freya yet, so Chii

Yagari or Kaien? (Vampire Knight) (again)

Kaien =)

Jun or Nori? (Rozen Maiden)

Jun, even though I think he's ugly (i LOOOVE your avi too, btw ;])

Hinaichigo or Kanaria? (Rozen Maiden)

Hinaichigo!! ^^

Shiki or Aidou? (Vampire Knight)

Shiki :lovestruc :lovestruc .....but i love Aidou too...
Bara suishou or Shinku?

uhmm...Shinku but Batasuishou is also beautiful ^_^

Yuuki (Vampire Knight) or Misa (Death Note)?

But Ryuk killed Light!!!!

MISA-MISA!!!

Shiki or Zero (VK)

Zero ^^ but I love Shiki too =)

Kaname (VK) or Light (Death Note)?

Ugh...can't decide, I love them both!! :lovestruc ... but I think I love Light more :lovestruc

Ichijou or Aidou? (VK)

Naruto or San goku? (idk, but they both wear orange)hahaha by the way, lelouch looks like kaname senpai

Idk who they are so...I can't say.
D:

Ray Penbar or Soichiro Yagami (Death Note)?

Soichiro Yagami n.n (he is waay more cute)

(btw yagami read backwards is im-a-gay, I just realized lol)

Light or L (Death Note)?

L Lawliet !!!!!! (though I love Light too.....)

hmmm.....Kanda or Allen ? (D.Gray-man)

Definitely Allen

Hmm.... OH I GOT IT!

Ryuk (Deathnote) or Sebastian (Kuroshitsuji)

Sebastian! :D

Cloud Strife or Reno?

Cloud

Kuran Rido or Hio Shizuka? (both from VK...)

Shizuka definitely!

Ciel (Black Butler) or Alois (Black Butler Season 2)