Which Talk Tool do you like? And which tool you have the most friends on it?

I'm a yahoo junkie. Been on yahoo since it first came about. I couldn't live without my yahoo. I talk to my friends daily on there and even do live chat. I tried msn and didn't care for it. I tried skype and didn't care for that. Icq was something of the wayyyyyyyy past for me. Totally forgot about it. May need to go download it and see who is on it.