I host my own mail server, owncloud, RSS reader, bookmarker, blog and a bunch of other stuff.
I don't particularly like sysadmin tasks or having to update stuff and then hope that nothing breaks, but I love the fact that I'm in control of my data and my computing experience.
On my phone I've been using Android without a Google account and I use the F-droid app store.
There are definitely still ways I'm being surveilled. That's just life in the 21st century I guess.
However, what I love about FOSS is that the software is not exploitative or antagonistic. So much closed-sourced software or Saas apps use sleazy, user-hostile tactics.
This is just not a problem with Free software. Yes, the UIs are sometimes bad or lacking and there might be bugs, but the whole spirit behind the software is, for me, so much more positive. I don't feel like I'm constantly fighting against software designed to exploit me.