A exciting anime
 

I want an anime that will make me wonder What would happen next and pull me back in for more excitement make me want to watch the next episode and never get bored. Gonna be a long weekend with nothing to do

You might want to post a list for comparison. Also so we don't name things you have already mentioned.

I'll name the usual suspects...

Death Note
Code Geass
Tengen Toppen Gurren Lagann

Any will do even if some i already wacthed

Given nothing but a bare-bones request and an Ichigo sig...

Hunter X Hunter

AirMaster

Tenjo Tenge

High School of the Dead

Desert Punk

YuYu Hakusho

Flame of Recca

FMA Brotherhood

Sengoku Basara

Durarara

Tokyo Tribe2

I shall second Durarara!! and also mention his older brother, Baccano!. There's also X TV and s-CRY-ed.

Here is what had me exited:
Baccano
Claymore
Code Geass
Death Note
FMA (both seasons)
Ga-Rei Zero
Ghost Hunt
Great Teacher Onizuka
Mahou Shoujo Madoka★Magica
Mai HiME
Monster
Phantom: Requiem for the Phantom
Shiki

Hope that some of those will catch your attention^^

definitely death note and highschool of the dead

cliffhanger endings in most if not all eps

easy to marathon

Noein definitely would be one to watch as well as Higurashi No Naku Koro Ni. I watched both of those when I was rather partial to anime, still I finished them within 3-4 days. I felt the storyline and plot twists were coherent and not forced.

Princess Tutu is another very well-executed anime but girly nonetheless it's probably one of the best work from Junichi Sato. In some way it's like MSMM. It looks bright on the outside but gets darker.

Madoka Magica

Neon Genesis Evangelion

One of these are good.
Baccano
Code Geass
Death Note
Durarara
High School of the Dead
Mahou Shoujo Madoka Magica