Been using Ubuntu, or more recently, Kubuntu since 2006. Not sure that counts as a distro change. Can't say enough good things about KDE these days though.

Back-feeding a generator into your house circuits. A very bad idea.

Or maybe just an IP address

KMail for Linux (KDE) and K-9 for Android. I used to use Thunderbird, but hit a couple of bugs that just wouldn't go away. Absolutely love KMail.