I voted AIM just because I'm more used to it, didn't get it until like 8 months ago, my boyfriend got me a name, and it all set up for me.
i think msn has the best overall features. better sound/video quality. i use aim more though because thats what my friends have
Exactly, and yahoo is a little bit safer than msn, and a lot safer than AIM. Between yahoo and msn though, I gotta go with yahoo for faster file tranfers, and better security. I think yahoo's network is starting to crap out though. Either that or they are in the middle of doing some major updates. It still works, but not as fast as normal.