The greatest anime EVAH.

[pyramid head grape]

Trying to be less fanboy but I wood have to say one piece only anime so far to make me cry :C
then...

hitman reborn
fairytail
darker than black
clannad
naruto (manga only hate the anime to its core)
D.gray man
hellsing

Thats about it.

 

[blind_dead_mcjones]

Patlabor
VOTOMS
Redline
Super Robot Wars: The Inspectors
Macross Plus
Macross Frontier
Gun X Sword
Vampire Hunter D: Bloodlust
Sengoku Basara
Gundam 00
Turn A Gundam
Baccano!
Durarara
Ghost In The Shell
Gasaraki
Jin Roh: The Wolf Brigade
Sentou Yosei Yukikaze

and finally, Legend Of Galactic Heroes

EDIT: The new Gundam Unicorn OVA's are turning out to be fuhreeeking amazing. Sucks that they come out once a year, but I havent been this impressed with a gundam series since Wing.

your mileage may vary there, granted visually it looks great, but story wise so far it just feels like UC fanwank, especially with all the blatant shout outs and the deliberate foray into the the 'true art is angsty' and 'darker and ediger' territory