This thread will probably be closed, since there is already a stickied FC thread.
However, in case this thread isn't closed, I would recommend you make a category for player location. Divide North America according to time zone (Pacific, Mountain, Central, Eastern), then further by state. If members come from other countries, make sure to note the city as well as the country.
As for the skill category, while 5 categories is certainly a good distribution, it might spread the members out too thin. I would simply divide members by Beginner, Intermediate, and Advanced. There are a lot of players who would probably put themselves in category 5 (just to be a category 5) when they really belong to a lower category. However, that doesn't change the fact that they're good players. Simple, broad categories will keep this thread from getting too complicated.
Edit: I don't see the point in listing characters. The point of this thread is to make friends.. it shouldn't matter which characters different members use. It's not like they're committed to those three once they've been listed.