Probably the members. They're the heart of the community really.
We have a few tournaments, games and our ASB (which I recommend) sections too, but it's the members who make them what they are. The staff are friendly and everyone gets on which is nice. The chat is always a fun place to be in, and it's a lot more friendly than in many other forums imho
This thread sums up others people opinions on the best parts of VR too, which I found useful at the time
http://victoryroad.net/showthread.php?t=9579