Mine's not a full homebrew, it's more along the lines of an 'upgrade' like CCR and BoP2.0, and it's more for the experience and to push myself to learn new things, while addressing some things I don't like about the game I'm working on (Haunted House).
I am actually toying with two different potential homebrew ideas after this one though. And those are simply because I'm looking to bring certain themes to a physical table. But a full homebrew is exponentially more work than a re-program.
-Hans