Martian Successor Nadesico

Boogiepop Phantom

Witch Hunter Robin

Naruto

Prince of Tennis

Bleach

School Rumble

Initial D

Love Hina

Gundam Seed

and many more (I watch a lot)

HAHA, well i guess ill go too.

Cowboy Bebop
Hellsing
Full Metal Alchemist
Trigun
Inuyasha
Neon Genesis Evangelion
Vampire Hunter D
Spirited Away
Lupin the 3rd

I've seen many more, but these are the ones I like.

Did you see originals or fansubs of Samurai Champloo and Samurai7? Ive been waiting for both series to hit US, but it seems to be taking forever.

akira
dragon ball ,z ,gt
witch hunter robin
all of the gundam series except sd gundam
wolfs rain
yuyu hakusho
ninja scroll
ghost in the shell
inuyasha
rouroni kenshin

There are lots of good ones in series and full length movies. My favorite movie of all time would be Golgo 13. Hitman, guns, chase scene. It has it all exept for the second movie.
And for series:
1. Tie (Naruto - Dragonall to GT)
2. Cowboy Bebob
3. Trigun
4. Inu Yasha
5. Hellsing
6. GunGrave
7. Hokuto No Ken
8. Mahoromatic
9. The Soultaker
10.AD Police

Most of my favorite series have already been mentioned, but here they go:

Witch Hunter Robin
Full Metal Alchemist
Gunslinger Girl
Initial D
Scrapped Princess
Love Hina
Ranma 1 1/2

I'm sure there's others, I just can not remember.

Evangenlion... Obviously. I watched this series when I was in high school and it pretty much screwed up the rest of my Anime watching for the next five years. I'm finally over it now, and can watch things and not have to compare them to Neon Genesis anymore... such a fantastic series...

Others?
Well, more votes for Cowboy Bebop and Lain, Trigun is fantastic as well.

If you want a couple of great one-nighters, I'd definately take the advice of the Studio Ghibli fans. Spirited Away was awe-inspiring. Princess Mononoke is great too, if a bit oversold.

Soooo much anime...

My favs are Hellsing, Vampire Hunter D: Bloodlust, Ghost in a shell, and The Voltage fighters seriers. Dragon ball Z is good too