Ther are more but atm:

Sola ED Mellow Mellody - Ceui
Fate Stay Night OP1 Disillusion - Tainak Sachi
Kanon 2006 ED Ayana
Claymore ED Danzai no Hana - Kosaka Riyu

my favourite anime is :

narouto

All one piece openings, D-Technolife (Bleach OP 2), Ichirin No Hana (Bleach OP 4 i think it was), Rolling Star (Bleach OP 5), Sen no Yoru wo Koete (Bleach movie theme), and all the Gundam SEED/SEED Destiny openings

Here's my top ten song, first 3 are in order the rest are not

1. Yakusoku wa Iranai - Vision of Escaflowne (Opening)
2. Getsumei Fuuei - Twelve Kingdoms (Ending)
3. Cloud Age Symphony - Last Exile (Opening)
4. Shine of Voice - Ichigo 100% (Opening)
5. 1/3 Junjou na kanjou - Rurouni Kenshin (Ending)
6. Allegro Cantabile - Nodame cantabile (Opening)
7. Mizu no Madoronomi - Fantastic Children
8. Kiseki no Umi - Records of Lodoss War (Opening)
9. Kopperia no Hitsugi - Noir (Opening)
10. Rolling Star - Bleach (Opening)

the last cool one that i saw was ergo proxy opening

bleach op always the best

fruits basket-opening..
chobits-opening..
full metal panic! the second raid-ending..

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i forgot to put

pretear-ending..
D

Shakugan no Shana OP is awesome. Other than that, I just like the Music

those opening song and ending song its just funny hearing it all the time and its fun.

Doubt and Trust - D Gray Man
PoT endings
Naruto - some op and ed
blood+ op
Sakura kiss- ouran