I've done the same, although I still use Google Search, and Gmail -- when I finally decide to switch email, I will switch to a self-hosted one, preferably.

OwnCloud is quite awesome as of version 6. If you're still running 5, I highly suggest updating. I love it as a platform for building web apps, too: done right, and you can get things like a Google Reader alternative embedded within, and hooked into DAV and the like for access across many different clients.

I love it :)