The problem for strong players on KGS is that it takes forever to find a match. That's why most strong players now play on Tygem (from SK) or Fox (from CN).
Pandanet (aka IGS) is Japan-based and they usually play Japanese style games. Tygem and Fox is where the most modern and aggressive Go is played. Pandanet is to Tygem/Fox what a formal duel among aristocrats is to a prison knife fight, or the difference between fighting a gentle martial arts sensei vs fighting an upset Mike Tyson.
KGS has now a web version, https://shin.gokgs.com/
It does not support registration, but once you are registered you can play there.
Pandanet (aka IGS) is Japan-based and they usually play Japanese style games. Tygem and Fox is where the most modern and aggressive Go is played. Pandanet is to Tygem/Fox what a formal duel among aristocrats is to a prison knife fight, or the difference between fighting a gentle martial arts sensei vs fighting an upset Mike Tyson.
KGS has now a web version, https://shin.gokgs.com/ It does not support registration, but once you are registered you can play there.