I personally think that players from Russia, and a lot of Eastern European countries for that matter, tend to play very aggressively. While I concede that there is a lot more to a player than the country that they are from, I do take it into account when deciding how to respond to some players actions. If I'm suspicious of a big bet from an opponent, I might wave my pointer over the player's name to see what country they are from as part of my decision making process. As I said, I've noticed that players from a lot of Eastern European, and quite a few south American countries seem willing to make big and even all-in bluffs at a higher frequency.
I see a lot of crazy aggression from Russian players.. and Brazil too, I guess. Maybe it's because there's so many of them? I see many great ones too.
