It's the 10 year anniversary of this console, which sometimes was hated because of its reliability problems (RROD), but I'm pretty sure beloved for its massive catalog of games. It saw Microsoft take a good chunk of the market from Sony, online play finally became an important aspect of a console thanks to Xbox Live and it was also the first console that recieved major software interface updates throughout its lifespan (and it's not quite dead yet it seems).
It has sold 84 million units so far. Not too shabby for a second entry.
So what is your story with the 360? I had the 20 GB white model (which hardware wise I hated. It was ugly and had a jet engine built-in. It never broke though) and eventually the S model (which was quite a lot better). For me it was the console that nailed the basics of the last generation. Most exciting games and best controller.
Timeline with "some" highlights (correct me if I'm wrong somewhere):
2005
November 22 - Worldwide rollout began
"First model of the Xbox 360"
"Blades!"
2006
August 31 - Xbox Live hits 50 million downloads
November 6 - Gears of War launches
2007
April 29 - Elite model launches
"The black Elite model"
May 29 - Forza Motorsport 2 launches
July 5 - Peter Moore publishes letter recognizing Red Ring of Death and extending system warranty
September 25 - Halo 3 launches
2008
October 21 - Fable II launches
November 19 - New Xbox Experience launches
"NXE and the introduction of avatars"
2010
June 15 - 360 S model announced
May 18 - Alan Wake launches
November 4th - Kinect for Xbox 360 launches
"360 S Model and Kinect. Both launched in 2010."
2011
December 6 - Dashboard redesign, "Metro" launches
"Metro"
2013
May 21 - Successor Xbox One announced
June 10 - 360 E model announced
"360 E, similar look to Xbox One"
2015
November 12 - Xbox One Backwards compatiblity with select Xbox 360 titles launches