Thats a good question. I thought everybody would be using Chris, cause his combos are really strong and difficult to read. In the game centers around here most people used him.
But the little lag present kind of kills his effectiveness, so people are just using the characters they like. The lag isnt bad, and I had a few lag free matches with people that have the same kind of adsl as I do.
I've fought the rank three guy a lot online, he uses mostly everyone. A lot of Vanessa, Ramon, Clark, just about everyone.
So far the community is great. For the first time a lot of japanese palyers are using the mic and just talking about kof. I was getting drunker than hell and just rambling on about shermies boobs, but it was a lot of fun.
The game gives you a rank, the highest I saw was rank 23. The rank changes a lot, I keep wavering from 1 to 4. My record sucks online, but its so much fun.