I like bitcointalk.com, today whatever I have learned about bitcoins is from this site only. When started as a newbie I was very excited about Bitcoins. There were many questions in my mind like what is bitcoins, how it works, how to use them and many more. My knowledge regarding bitcoins has been increased only because of bitcointalk.com. There are so many threads and discussion which are helpful for the beginners.
That's true that you can gain knowledge from this forum but you are forgetting that you can also earn bitcoins from this forum by joining signature campaigns, and it is the best and the safest way to earn bitcoins, but yes it is definitely best for the newbies who are learning about the bitcoins and want to earn bitcoins and want to continue with it.