Your fav 5 animes of all time??  

1. Naruto
2. Bleach
3. Ippo Makanuchi (something like that)
4. Beck
5. Whistle

There are still more that I like to watch, e.g. Initial D, Dragonball Z, Ronin Warriors, and more. But so far, I would have those that I numbered above the top five.

1. Cowboy Bebop
2.Saiyuki
3. Decendants of Darkness
4. Samurai Seven
5. Samurai Deeper Kyo

1. naruto
2. mirumo De Pon
3. Suzumiya Haruhi
4. Ouran Host club
5. Meitantei conan

1.naruto
2.school rumble
3.azumanga diaoh
4.one piece
5.gintama

in no particular order

1. gundam seed
2. full metal panic
3. code geass
4. konjiki no gashbell
5. vandread

Wow, this is hard. And it's probably going to change once I get a chance to watch some more anime, but here goes:

1) Cowboy Bebop
2) Samurai Champloo
3) Full Metal Alchemist
4) Slayers
5) Ippo - Fighting Spirit

1. Naruto
2. One Piece
3. Bleach
4. Death Note
5. HunterXHunter

so hard to pick a top 5, but here are some just off the top of my head:

1) sailor moon
2) NANA
3) slayers
4) peach girl
5) hana yori dango

for me, from older to the newest anime.

1. yu yu hakusho
2. trigun: vash the stampede
3. hunter x hunter
4. naruto
5. d.gray-man

1. Air
2. NHK ni Youkoso!
3. Tengen Toppa Gurren Lagann
4. Mahou Shoujo Lyrical Nanoha A's
5. Doujin Work

Not in any particular order. It'd take far too much time to put everything into a ranked list. Way, way too long.