What messengers do you guys usually use? I'm not terribly talkative, except in person, but I occasionally feel like chatting with folks.

Mostly I use Skype and Steam, but I also still have a Trillian account which bundles up my ancient AIM and MSN accounts. I'm going to be uninstalling Trillian however, since I never use it, and because on the odd occation when I do, it spams me with notifications relating to some error in my AIM login (even when I turn all notifications off). But I'm not sure what the modern equivalent is other than Twitter or Facebook, neither of which I'm willing to use.

So if there's a good alternative, I'm willing to give it a shot.