I chat, I message
Since I stopped using Windows as an OS for personal use, almost four years ago, I also gave up using IM chat programs. Back then, I was a fairly big user of MSN Messenger, but when I found the Mac version at that point to be flaky to say the least, I ditched it completely. And I didn't miss it at all. Apart from using Skype for remote work purposes, I've shied away from almost all other chat programs.