1)Kannazuki no Miko, no contest. Not even close.
2)Scrapped Princess.
3)Escaflowne(series, NOT movie)
4)Bubble Gum Crisis 2040(not the old ones, alas, I dislike incomplete stories)
5)Azumanga Daioh / Excel Saga

hmm... my top 10 would probably consist of :

- slayers series
- hunter x hunter
- ouran high host club
- one piece
- MKR and MKR II
- prince of tennis
- kanon
- rurouni kenshin
- sukisyo
- gravitation

!. Love Hina
2. Bobobo-bo bo-bobo
3. .hack//
4. Legendz
5. Tokyo mew mew
6. Chobits
7. He is my Master
Those are the bestest EVER! espescially the last two

no order.
1. Dragon Ball z
2. Ranma 1/2
3. Love Hina
4. Bleach
5. Naruto
6. Tokyo Mew Mew
7. Outlaw Star
8. Slayer series
9. Card Captor Sakura
10. Yugioh all series
11. One Piece
12. Death Note
I have many more I like/love but those are all of the animes I can remember right now.

....and Shin-chan. Don't forget about Shin-Chan

1)La mélancolie de Haruhi Suzumiya. Boring, and long, but so fun.
2)Shakugan no Shana. Sometimes, a little too stupid, but generally funny.
3)Higurashi no kano no...euh... et caetera! A lot of blood, many horrible torture scene, but a complicated story. The anime who makes you fell smart. Unlike Death Note.
4)Lucky Star. No story, no change, but a lot a "kawai" little story!

Because of those anime, I'm trying to learn japanese.

In no particular order:
.hack//SIGN
Death Note
FullMetal Alchemist
Bishoujo Senshi Sailormoon
Ouran High School Host Club
Hellsing (the OVAs, not the regular anime)
Damekko Doubutsu (26 five-minute episodes of epic adorable WIN =D)

My favorite animes are:

Ronin Warriors
Bleach
Full Metal Alchemist
Inuyasha
Naruto
Code Geass

All are classics! Except Ronin Warriors. I don't know it.

Code Geass and Air Gear! :D