This time i'll tell you about HoN community.
In general, i think HoN's community is one of the worst communities ever. I am dead serious about that(i've made some nasty habits my self playing this game). Make one mistake, and you will be flamed until the end of the game, and even after some people will whisper you with tons of bad words, and excessive rage. But as everywhere there are quite a lot of exceptions. There's been a movement called "Making a difference" for quite a while, and well you can see effects of it. The flame levels have detoriated by far, since closed beta times, where you would get flamed for missing a creep kill or being too slow when buying items. People either don't care anymore, or they just get over it and try to be nice. But still there are a lot of people who think that everyone is perfect, and makes no mistakes while playing. Common issue is blaming everybody for everything. Oh i've been flamed so many times for someone other's death even if it was entirely their fault.
This game is very begginer unfriendly, there are tons of servers named "Noobs in here" and people just buy sub-accounts to stomp new players trying to get the basics. I am a lucky one, since i've learned to play with my friends, but even then when i tried to play on my own to get better, you just get yelled at.
After you get into higher skill games, those badass teens, screaming and swearing seem to fade away. But trust me, getting through the starting area is hell on earth.
Overall it is getting better, but compared to other games communities, this one is bad.
What about you guys? Do you often find your self swearing at montior and slapping keyboard for your own mistakes?(Haha, i do it quite often, but well it's better than yelling at other people :) )