how often do important events happen? (events that include a lot of players.)
In my experience, they usually only happen as someone if trying to get the Conqueror's Pledge achievement. There aren't too many of us that are super active all the time. I think I've only seen a location/war/horde happen once, as we usually just interact with each other on our boards. As an example, the last "large event" was mostly five players, and it was on someone's board. (It was on TEST's board, and starts near the bottom of page 10, if you feel like reading it. Parasign and I were trying to get Conqueror's Pledge) If you want your character to interact with someone else's character, just attacking their board and having the character introduce themselves is probably a good start.