Which is the most famous chat program now?

[chikiwighi]

This one is a simple questions and a polling panel to check which is the most famous chat program now. There are many chat sites that you may be using. my usage depends on the use. If it is official I prefer pidgin and when to chat with friends I prefer Gtalk. Now please tell me which one is your favourite? So which Chat service are you use more often ?
Yahoo -- Yahoo Messenger
Google -- Gtalk
MSN -- Hot mail

Advance thanks for any replies.

[Chris]

For Google talk and MSN, I use Adium on the Mac which is based on pidgin.

On Windows I use the official clients.

I use MSN the most.

[Lou]

I've yet to find a suitable (i.e. one that I like) client to use on my Macbook, so I simply don't IM at all on there. As for my Windows Pc, I just use WLM.