The first year or two, I focused almost exclusively on Celtics Talk. Now, I try to read and write in the other sections of the forum. It's a good community to interact with.
Specifically about Current Events, it's one of the few places online where you get ppl of different political persuasions interact on a regular basis. Most internet places usually become the exclusive territory and echo-chamber of one ideology (noticed this first on FB some years ago) or, you get places like reddit, with a very wide variety of opinions and ideologies, but it's mostly a dialogue among complete strangers. So, yes Celtics Forums Current Events is a good place.