It's been a while since I've used anything but Facebook chat, and that not very often. Never really got into the habit - I was working with a super-paranoid sysadmin for many years who wouldn't allow chat programs at work, and at that time I didn't have home access (maybe dialup).

I'm not sure I ever recovered from my introduction to chat in 1989/90 when it was revolutionary, and my mind went completely blank. I could talk to a stranger in the next room by typing! Wow! Um...