Installed Gears 2, quiet, load times are quicker, no disc read errors!!! Everyone wins!! Apart from my hard drive.

120GB HDD here, I got it quite a while ago.  I currently have the following installed :

Fallout 3
Banjo Kazooie Nuts & Bolts
Far Cry 2
Left 4 Dead
Gears of War 2
Midnight Club LA
Dead Space
Mirror's Edge
Tales of Vesperia
Lost Odyssey
Eternal Sonata
Soul Calibur 4
GTA4
Orange Box
Oblivion

Only 5.9GB left after all of that :X  I have ~50 XBLA games installed, probably like 5GB of DLC, but I deleted all my videos & demos off to make room for some installs.

The only thing I've installed so far is Lost Odyssey Disc 1. 

Condemned 2 , Gears of war 2 , the Darkness , Fable II , Need for speed undercover , fallout 3 

I can only install one game and right now it is Banjo and Kazooie its a great game and the install makes it load alot faster.

Mass Effect, Burnout Revenge, Burnout Paradise, COD4, GTA4, DOA4, PGR4, Beautiful Katamari, and Lost Planet.

I've installed Burnout Paradise (which makes no difference) and Call of Duty: World at War (which makes load times much faster). I'm thinking about installing Gears of War 2 and Fable II to it also, after all I've got 75GB of free space! ;)

Far too many. I have Gears 2, Mass Effect, Fable 2, Fallout 3, GTA IV, The Orange Box, Bioshock, Dead Space, Prince of Persia, Far Cry 2, Left 4 Dead, Banjo, Oblivion, and I even did Halo 3 just because it was really jarring to hear my 360 actually running at full capacity now. Each game loads better (except for that one exception, which is hardly noticeable thus far) and I've noticed smoother frame rates on games with larger open worlds (Oblivion, Mass Effect, Fable, Fallout 3, GTA IV). Best feature of the NXE.

Nuts and Bolts-Only because it's scratched and I want to be able to play it, though. I've only got a 20 gig hard-drive, I can't afford the install space for anything else.

I've got Fallout 3, GTA IV and gears 2 on mine, just to make it quieter more than anything

Gears 2 because it doesn't work unless it's installed :(

Just COD5 I think.  I might have installed GoW 2, can't remember. 

I installed Fallout 3 and i made a little diffrence on the load and save screens

Further updated list Bold is new!

Fallout 3
GTAIV
Mass Effect
Rock Band
Rock Band 2
Fable II

I only have 20 GB so i just install whatever game im currently playing.

GoW2. Thats all my 20GB has room for. I need more space:(

I installed Fallout 3, it then raped my hard drive of space, so i uninstalled it and am never installing a game on to my hard drive ever again.

I have a 20GB at the moment with Gears 2 on, I'm gunna get a new 360 at christmas though, so I will most likely install Gears 2, Burnout Paradise, Fable II, MK vs. DC... and maybe Halo 3 aswell, I'm not too fussed about a few extra seconds of load time.

Fallout 3.   I only have a 20g HDD so only 1 game at a time for me.

"I've only installed Gears 2 so far, and I'm planning on installing Fallout 3 later.

What are your game installs thanks to the NXE?

"

i only have 3 games GTA 4 COD 4 and HALO 3 they say not to install GTA AND halo and COD4 wont install cuz its scratched

The only two 360 games I own; Mass Effect and Gears of War 2.

So far, just Fable 2.