What makes a worthwhile forum?

After visiting the forum of Blain Reinkensmeyer, one of our frequent guest bloggers, I started thinking about forums. So I started searching. There are hundreds, if not thousands, that I came across. Some free, some paid, and all different. I ran across some that were very niche, only covered "edible futures" (YES EDIBLE FUTURES). After looking through as many as I could manage in a 3 hour time window...I decided to go to our amazing user base to see what they think makes up a worthwhile forum.

Blain and StockTradingTogo have a forum that I spent a good bit of time reading, and learning from. Take a look at the StockTradingToGo Forum, analyze the posters and moderators, look over the content, and see how it compares to YOUR favorite forum.

There are many things that make up a good forum...but what do you think are the most valuable tools?

Please post in the comment section what YOU think makes up a good forum. There are no right or wrong answers as everyone trades differently, thinking differently, and needs different info.