Uhh havent seen maneh anime but here I go (no order realleh)
Fav
Saiyuki
Initial D
Scyred
DB (all of em)
DNAngel


Least Fav
Pokemon (Gotta hate em' all!)
Paranoia Agent
Evangellion move (had the stupidest ending)
Inuyasha
Kits

Awesomeness (unordered)
- Full Metal Alchemist
- Samurai Champloo
- Outlaw Star
- Samurai X
- Vision of Escaflowne
- Vampire Hunter D: Bloodlust
- Cowboy Bebop
- FLCL
- Neon Genesis Evangelion
- Gundam 08th MS Team

Horrificness
- Bo-bo-bo...
- Vandread: The second stage
- Pokemon
- erm... cant think of any more

Top 10
1) Naruto
2) Soukyuu no Fafner
3) Ranma 1/2
4) Elfen Lied
5) Tsubasa Reservoir Chronicles
6) Jubei-Chan 2
7) Gungrave
8) Samurai Champloo
9) King of Fighters: Another Day
10) Yu-Gi-Oh! / GX

Least Liked:
1) One Piece
2) Bo-Bo-Bo...
dunno what else...

Favs: ((I'll get as close to 10 as possible)
Gungrave
Texholyze
Ghost in the Shell
One Piece
Death Note (I don't know if theres an anime or not actually)
Bleach
Shadow Skill
Armitage
Akira
Last Exile
((I did it mommy!))

Least:
DB/Z/GT ((Too overrated))
Yu Gi Oh ((anime based off of a card game....))
Pokemon ((I toss my balls at you, and you mine))
Vandread ((I don't know....I just do it, like apple jacks))
and a lot lot more....

Faves:
(no real order)

Shaman King (great concept and characters)
Yu-Gi-Oh (I think the concept is what made it, a card game to save the world makes as valid a fantasy world as giant robots etc)
Ikki Tousen (Oh yes, the fan service of it all)
Cowboy Bebop (A classic, if you don't like it you're just wierd lol)
Full Metal Alchemist (Very well drawn and has it's moments where you have to think about stuff)
Escaflowne (I like the imagry in this one, plus archaic mechs was pretty cool)
Outlaw Star (Just a fun trip with good music and characters)
G Gundam (best concept for Gundams ever, good art for it's time and some nice tense episodes)
Vampire Hunter D: Bloodlust (A gem of anime, if you haven't watched it yet go do so)
Hayao Miyazaki, or anything done by him (He's a national treasure, seriously a genius)

Least:
Bo bo bo...bo...bo...however many "Bo"s there are
One Piece (the American ANIME) (the manga is really good imo)
Naruto (American ANIME) (See One Piece)
Inuyasha (Quite possibly the worst anime I have ever seen)
X (I'm all for the gothic thing and all, and the movie was good but man, the show was just too much for me)

Can I criticize people's choices? Or will that be considered flaming. >.>

Well you can but we rather you not. Everybody like different things even if it is dumb to you. I also changed it to top 5 since nobody wanted to do top 10.

in no order..

naruto
bleach
one piece
ranma 1/2
trigun
outlaw star
eva
Rurouni Kenshin
Fullmetal Alchemist
DB/DBZ

thats about all i can think of off the top of my head ... and all those have to be sub, dub is nothing but murder to all anime

isnt much i ddint like, bo bo bo and pokemon did suck tho

My top Favorites?
In no specific order

Gankutsuou
Hellsing
Hunter X Hunter
Rah Xephon
Bleach (manga more so)
Naruto (Manga really...Japan)
Outlaw Star (heck yes)
One Piece (Japan)

Least Favorites
Don't really have any...
Really, anything brought here and dubbed/cut up.
Oh, and the posers. Like Code Lyoko.

Top 5, In no particular order:
Noein
Lain
FLCL
Ghost In The Shell
Fist Of The North Star (comedic value... Oh god, its so bad you can't help but be cracking up)

5 Least Favorate:
Fist Of The North Star (worst anime ever made. Ever. It's bad enough to take the next 4 spaces in this too.)
Fist Of The North Star (again)
Fist Of The North Star (again)
Fist Of The North Star (again)
Fist Of The North Star (again)

Probably could toss in a few more on each, but really... do I care?