Writing my game.  
It's a PC game, it's sprawling, it's complicated, it's way too big for one person to finish, and I'm doing it by myself anyway.
Been hacking on it for almost five years now.
It's... 95% done?  Getting real, real close.
I am a strange combination of excited and tired of it.
I've just got to finish it.
(Before anyone asks, no, it won't run on an arcade cabinet; ain't that kind of thing.  A little more Falcon 4.0, a little less Aero Fighters.)