Playing with ownCloud made me think, hey, this is most of what I currently do with Google's services! Why not replace them with ownCloud and be a bit more free? My current policy is to use "just free software plus Google's stuff". It requires me to trust Google enough to use their services. The upside of Google is that they provide most of the stuff I need, and they're actually good. The downside is, of course, that I need to trust them. With ownCloud, I would not have to trust anyone but myself - and whoever maintains my server if that's not me, and my ISP, and... oh I don't even know. Not Google though!
I'm a member of the Kapsi.fi community, which gives me access to some servers I can use. Currently I use them just for this blog and a ZNC instance (or irssi if i feel like irssying), but I'm also entitled to a rather generous amount of disk space there. So why not get rid of Google and use ownCloud for everything?
This is not an ownCloud review, but rather a note for Google users: Google makes it really easy to get out, and that's what eventually kept me in. I tried life outside Google for about a week, and it is possible. This is very comforting to know.
Despite of ownCloud's greatness, Google's services are still a little bit more convenient to use, and the possibility of escape makes it less frustrating to stay in. They're still not evil enough for me to go.