I love seiyuus!!!!
My top favourites are
Miyano Mamoru - Ouran HS Host Club, Soul Eater, Vampire Knight, Hakushaku to Yousei, Skip Beat!, Death Note, Kyou Kara Maou
Hirano Aya - Melancholy of Haruhi Suzumiya, Lucky Star, 20Mensou no Musume, Hyakko, White Album, Death Note
Chihara Minori - Melancholy of Haruhi Suzumiya , Minami-Ke, Lucky Star
Others I like:
Maaya Sakamoto - Ouran HS Host Club, Soul Eater, Kurosh!tsuji
Daisuke Ono - Melancholy of Haruhi Suzumiya, Kurosh!tsuji, Kaze no Stigma, Minami-Ke, Neo Angelique Abyss
Daisuke Kishio - Vampire Knight, La Corda D'Oro, Junjou Romantica (

)
Fukuyama Jun - xxxHolic, Code Geass, Special A, Valkyria Chronicles, La Corda D'Oro, Vampire Knight
Marina Inoue - Minami-ke, Skip Beat!, Sayonara Zetsubou Sensei, Valkyria Chronicles
I always try to check out the seiyuus for the anime shows I watch because it always surprises me whenever I find out about what roles they've played in other shows. Sooo talented!

Some images for those who dont know them

Daisuke Ono

Chihara Minori

Marina Inoue

Vampire Knight Cast: Miyano Mamoru (Zero), Horie Yui (Yuuki), Daisuke Kishio (Kaname

)
Horie Yui also voiced for Tohru Honda (Fruits Basket), Ayu (Kanon) and Im sure there's more...she's been around for a quite a while now

Ahh~~I love this thread