We'll I'm not quite a huge anime fan, so I can't recommend anything, but I'd be glad to see some anime recommendations and impressions in this thread! :)

Deathnote
Beelzebub
Rurouni Kenshin
Full Metal Alchemist
Kenichi, the mightiest disciple
Highschool of the Dead
Princess Lover
Bokura ga Ita
Kimi ni Todoke
Hellsing
Hellsing Ultimate

My favorites:
Fist of the Northstar - movie and multiple series - from the original FotNS all the way to Fist of the Blue Sky
Vampire Hunter D- movies 1 and 2
Basilisk series
Ninja Scroll movie
Raven Kuboto movie
High School of the Dead series
Zombie Loan series
All that is Robotech and Macross- which includes mutliple movies and series
Is it a Zombie? series

Here are some cool anime ^_^
Vampire Knight
Trigun
Bleach
Naruto Shippuden
Hellsing
High School of the Dead
Mayoi Neko Overrun
Hope I helped ya'

berserk, GTO, Claymore, First of the north star.

Fist**

Hi guys, will you please recommend an anime which has less then a 100 episodes(less then 50 is perfect),and has good story line, like Wolfs rain or Death Note?

Naruto, Kuroshitsuji, Bleach, One Piece, Fairy Tail, Highschool of the dead and Deadman Wonderland :D

Same thing here :)

Sola

If no one has said it yet! Initial D... One of the only shows that can make entire episodes about driving down a mountain seem extremely badarse.