i hope i didnt forgot one, dont use MAL :/

1. NGNL / Code Geass
2. zero no tsukaima
3. Naruto ( without the Fillers )
4. Railgun
5. Final Fantasy: The Spirits Within
6. Kuroko No Basket
7. Love Live
8. Is It Wrong to Try to Pick up Girls in a Dungeon? ( maybe higher depand on ending )
9. Sakurasou no Pet na Kanojo
10. Campione

Dragonball
Elfen lied
Code geass
Death note
Claymore
Spice and wolf
Phantom: Requiem for the Phantom
Devil May Cry
The breaker
Ares

yu yu hakusho
hajime no ippo
hunter x hunter (original)
initial d
itazura na kiss
daily lives of high school boys
cross game
avatar: the last airbender
over drive
great teacher onizuka

i knew i was missing one.
ide probably replace over drive with nodame cantabile.

dragon ball z
elfen lied
steins gate
monster
naruto (parts of it anyway)
hajime no ippo
berzerk
death note
ghost in the shell
spice and wolf

Elfen Lied
To aru majutsu no index
Hellsing OVA
Evangelion
Toriko
Trigun
Attack on titan
City Hunter
Battle Angel Alita OVA
Great Teacher Onizuka

Impossible to fit only 10~

No order

Bleach
yu yu hakusho
Hunter x hunter 2011
Code geass
Sword art online
Hajime no ippo
Baki the grappler
Prince of tennis
Naruto
Slam Dunk

could easly do top 20 or even 50 so many good animes worth mentioning IMO.

boku no pico
boku no pico
boku no pico
boku no pico
boku no pico
boku no pico
boku no pico
boku no pico
boku no pico
boku no pico

1. Kara no Kyoukai
2. Rurouni Kenshin: Meiji Kenkaku Romantan - Tsuiokuhen
3. Shinsekai yori
4. Mononoke Hime
5. Kaze no Tani no Nausicaä
6. Seirei no Moribito
7. Kemono no Souja Erin
8. Saiunkoku Monogatari
9. Fullmetal Alchemist: Brotherhood
10. Hunter x Hunter

After the first three, the rest are all separated by a thin margin.

1: Zero no Tsukaima (Will always be my favorite because it introduced me to anime.)
2: Clannad
3: Eureka 7
4: Highschool DxD *light novels are better though*
5: Mondaiji-tachi ga isekai kara kuro sou desu yo!
6: Yu Yu Hakusho
7: Fate/Stay Night
8: One Piece
9: To love-Ru
10: Code Geass