First of all thanks to you, OP, for creating this thread!
I came first in contact with OG Xbox back in 2002 when my older brother bought it shortly after launch in Europe for 479 Euros! I didn't had any interest in the console back in the days because I was PC-only during this time and my consoles before were japanese-only (Dreamcast, N64, PSone, SNES, NES in particular). I just laughed at MS's huge box and controller and last but not least the impertinent price tag, which I wasn't able to afford even if I wanted.
Nevertheless I had a look on Halo and played it coop on Legendary with my brother. We had a ton of fun and I was literally blewn away by the graphics. Man, they were gorgeous. I was eager to play Halo since a friend, my brother and myself couldn't wait to play this since it's original announcement for PC. With this short burst my experience with OG Xbox ended. While I love the 360 and own the XOne since launch this thread totally got me hooked up and I've purchased an OG Xbox from eBay with two Duke controllers (I LOVE them like back in the days), original package and documentation in very good shape. I only hope it keeps running since it has been manufactured on March 3rd 2002. After my first playsession which lasted ~1hr and shutting down the console it made some strange crackling sounds. Hopefully it wasn't the power supply or some consistors.
Which I'm totally missing in terms of games in this thread are the Oddworld games! Wasn't anyone playing and actually enjoying Munch's Oddysee and especially it's awesome successor Stranger's Wrath?! The first one I've played as a launch title on my brothers Xbox back in the days, but I didn't finish it. I can remember that I really was enjoying it for it's weird style and characters as well as it's gorgeous humor!
Now I've started with Stranger's Wrath on my OG Xbox and man, this game totally rocks! Stranger is some ass-kicking, frikkin' cool character, again the humor is great and boy, the graphics are just awesome! Even today! All these details, lightning and huge landscapes. Gorgeous! The OG Xbox was a beast and way ahead of it's time
My collection
Oddworld: Munch's Oddysee
Oddworld: Stranger's Wrath
Conker: Live & Reloaded
Grabbed by the Ghoulies
Panzer Dragoon Orta
Psychonauts
JSRF and Shenmue II incoming, hopefully in good condition.
Oddworld Stranger's Wrath
Here are some shots of my OG Xbox and setup (the stains are from cleaning the console with a wet cloth, but shortly after they have desiccated)