Got mine at Christmas in 2006 and remember hooking up it up Christmas night to the router - still wired at the time, so had to take it out to where the computer was along with the TV - and playing Gears of War online co-op and multiplayer all night through to Boxing Day. Just brilliant and was the first time ever where it felt like gaming was starting to be a lot more social to me.
Another glorious memory is that nine months after getting it, it basically died. The funny thing isn't that it didn't die through RROD (disc drive-related). Rather, it died on the day Halo 3 launched and also the day (or a few days before, can't remember specifically) the multiplayer beta for Call of Duty 4 launched.
One other final memory is how one night, a couple of my fellow games writing peers and myself played multiplayer on Battlefield: Bad Company 2 and I just started bellowing out Imogen Heap randomly.
For me, it's one of the best consoles ever, even if the hardware wasn't the best. Software is what rates it so highly for me. To name but a few of the games that I've enjoyed mainly or solely on the 360:
+ Halo 3 (The Covenant - there's still no other level like it in an FPS)
+ Gears of War
+ Project Gotham Racing 4
+ Fable II
+ The Mass Effect Trilogy
+ BioShock and BioShock Infinite
+ The Orange Box
+ Crackdown
+ Call of Duty 4
+ Forza Horizon
+ Alan Wake
+ Grand Theft Auto IV
Nevermore. God speed, Xbox 360.
A bit early.
More facts:
It will never reach 90 million. And it's still on last place in its generation if you look at "units sold worldwide".
Thanks for the driveby. Now if you don't have something constructive to say, bugger off.