I've got mine mainly from anime, since I've only now started on drama
All time fav song would be difficult...ok,the favs:
Vanity & Lacrimosa - both composed by Kajiura Yuki, performed by Kalafina, well, everything by KY,
really, they're double the fav songs :D
Sayonara Solitaire - also KY (funny thing is I
didn't know at the beginning that this Chrno Crusade ending theme was composed
by her, still loved it :D
Hear Our Prayer - Tsubasa Reservoir Chronicles
To Nowhere
It's Only the Fairy-Tale - Mai-HiME
Kimi Ga Ita Monogatari - performed by See Saw, this one gotta be of the the fav songs ^^
Rolling Star - Yui, been ages since I last
read/watched any Bleach, but I
still love this one, always cheers me up and I can sing along
Stories & Continued Story - Hitomi
(both from Code Geass, gotta be of the most beautiful & sad songs ever)
Darkness Eyes - DBSK TVXQ
Tomorrow & Sore ga, ai deshou - both by Mikuni Shimokawa for Full Metal Panic
From Guilty Crown OST - Euterpe, Departures ~ Blessings, Release My Soul, βios
Heaven's Not Enough - Yoko Kanno, performed by Steve Conte for Wolf's Rain
Hilcrhyme - パーソナルCOLOR
Saga~This is My Road - Kanon (for the Guin Saga, thou have yet to see it)
Still Doll & Suna no Oshiro - Kanon Wakeshima (both were for Vampire Knight endings)
Agony - Kotoko
Guren no Yumiya & Moshi Kono Kabe no Naka ga Ikken no Ie da to Shitara - Linked Horizon (from Attack on Titan, plan to watch it)
Gravity - Maaya Sakamoto (Wolf's Rain ending)
More Than Words (Code Geass: Akito the Exiled)
Saigo no Kajitsu (Tsubasa Tokyo Revelations)
Garden of Everything - Maaya Sakamoto & Steve Conte
Hyousa & Resonance - Rurutia
And I'm Home - Sayaka Miki and Sakura Kyouko
Naraku no Hana - Shimamiya Eiko
Broken Wings - Tane Tomoko (Trinity Blood ending)
Beautiful World & Sanctuary - Utada Hikaru
Turned out quite few lol, but these are the ones I actually do listen to ;)