Most Addicting Animes

Denno coil: Loved the art, and the original storyline.

FLCL: cant get more random than this show.

Abenobashi shopping arcade: Was full of great parodies to other anime.

I loved every anime you listed, and Welcome to the NHK! was my favourite out of those. However, the wait for the next episode was nowhere near as painful as Code Geass and DBZ. This is a list for addictiveness, not overall, after all.

Beck is my cigarette (Hormones)

Baccano! is my nicotine (Blood)

BLACK LAGOON is my circulatory system (Heart)

Gintama is my lung cancer (Soul)

I'd have to say that I would really agree with a lot of you. But I tend to get really into the sports anime, mainly baseball.

3. Touch. The beginning was not too bad, but once you start to get to the runs for Koushien, and the deeper drama that the series develops as it goes along it becomes hard to just watch one a week, let alone one an hour. I'm glad I was able to watch it as fast as I wanted to or I would have been driven crazy waiting 2 years to see the climax.

2. Ookiku Furikabutte, but only the game arc. That game was soo addicting, but without taking a whole day you cannot watch it in one go. So no matter how hard I try I always need to put it aside to try to focus on something else... it never works.

1. Kenichi. I would have to say that it is one of the most addicting series I have watched in a long time. How it's written you really want to root for Kenichi as he is forced to fight his way through delinquents all the while he doesn't want to. That sort of internal conflict and fear he continually must overcome always draws me in. If I do watch it I can almost never watch just 3 eps, and one of these days I swear someone is going to find me doing a yamazaki to a wall after an all night marathon.

There are others that also deserve honorable mention, and some that might be higher on the list, but I really wanted to get some different anime out there than have already been mentioned. Like TTGL.

1. Hayate no Gotoku!! Love it especially season 2
2. Lucky Star Got me back into anime and was really fun to watch
3. Polyphonica Crimson S I found it to be a nice and simple could watch it many times like my top 2
4. Shakugan no Shana Urusai! Urusai! Urusai! ^^

1. Bleach

2. to aru kagaku no railgun

3. Minami-ke

@rubhereforluck: Nice, just nice. I could definitely relate to the list you have made. The only difference is that I'm not fond of marathons; 3 episodes of the same title in one sitting is the most I could do (4 if I don't like a series all that much).

Touch - I just finished watching episodes 84-85 earlier; I never would have thought that the fugliest fag in the series would return.
OokiFuri - I watched through the entire contest while virtually standing up and unconsciously cheering for Nishiura!!
Kenichi - the series where my name originated from, what else is there to say?

3. Bakemonogatari - The art style and the monolouges/disscusions that the characters had were great and got me sucked in so quickly
2. Black Lagoon - The whole modern day pirates and giving the bad guys a history always made them more interesting than initially appeared
1. Cowboy Bebop - Can't help it I will always love this show and still watch the fucker

I actually started reading the manga because I couldn't wait for the next episode.

@HermitIV - Had to do a quick check, but you meant Yoshida the Emo kid right?

Darker Than Black
Code Geass
Lucky Star (If not the anime, the OP was definitely addicting)

EDIT: Oh shit, almost forgot Kimi Ga Nozomu Eien.

Afro Samurai was a little short to get addicted to. 5 episodes and a movie got over in like 3 days for me. If the series had been longer, I suppose I would have gotten addicted.

I dont know but I usually watch some pointless anime repeatingly

Lucky star - watched it 4 times already
Minami ke - watched it 3 times
Azumanga Daioh, Hayate no Gotoku, Pani Poni Dash and all those weird and pointless slice of life shows.

Shows like Code Geass and story heavy ones, i tend to only watch it once....does not feel motivated for a second run.

bakemonogatari and railgun are my current addictions right now

Oooooh sports animes. I absolutely love sports animes (well, the serious ones at least. I cannot stand Eyeshield21 D: ) and so I will definetely be checking those 3 out.

Code Geass
Bleach (only up to first +-70 episodes)
Fate/Stay Night (it was probably the fastest and craziest run through any anime of any time - but I've watched it before playing the VN)

5. GTO - Love it. It's quite lengthy to watch it all, but WTH, I enjoy watching. And rewatching it.
4. .hack//Sign - This one is my popsicle. I like the soundtrack, I love the story, I like the yuri ending. Yummy ^_^
3. Black Lagoon - The only reason I keep watching and rewatching it is that it places GUNS with TRIGGER-HAPPY FEMALES and AWESOME and KICKASS and AMUSING in the same boat.
2. Rental Magica - Until now I've been wondering just why I keep rewatching this. Maybe it's magic, but anyway, I still like it nevertheless ^_^
1. Minami-Ke (all three reiterations) - Pretty fun. Innocent fun, and to think it's full of kids and a few collegiates and a few other characters, but I like watching the daily misadventures of the Minami sisters ^_^

Yey minami-ke

3. Honey & Clover - Definitely my favorite romance anime. I loved almost every aspect of it, the characters, the story, the characters, the sheer magnitude of the awesome.
2. .Hack//Sign - I loved it! I loved it with a freakish obsession I did!
1. Cowboy BeBop - This is pretty self explanatory.

3) Ghostory (over Evangelion) - it came down to Ghostory making want to read Medaka Box, UroUro, and Zaregoto, whereas Evangelion didn't really make me want anything past the anime.

2) Code Geass - watched it subbed, watched it dubbed, buying the limited editions ...

1) Pokemon - Hey, I'm still watching it without missing a single episode or movie or special.

Full Metal Panic. Have watched the entire series in English and Japanese 3times each.

Spice and Wolf. Economics is boring, except if you throw in a cute wolf goddess falling for a mere mortal, imo.

Rurouni Kenshin. Awesome musical score.