i've gotten to play with cool people from pretty much everywhere and the only real thing i notice is when people don't communicate at all. at least if there is a language barrier, most people i come across will use the in-game commands and will try typing understandable "english" if they can't speak the language well with a mic. one of my most enjoyable games was when i was playing with 130 ping in some UK server with a couple french dudes and 2 of my clan mates.
the thing i've always appreciated about TW's games and community is that most people really in it for the fun of playing the game. i've rarely ever had issues with griefers and whenever there was a problem, there's usually a server admin that takes care of it. or, you can just hop into another server and you're good to go.