My first adventure onto cigar BBs was the Internet Cigar Group where I spent most of my Newbieness. I haven't posted there in years. Second was the now defunct, JRBB which was the first BB where I spent a significant amount of time. The third is Cigar Weekly and is my main cigar BB for posting. CP is the only other cigar BB that I think is worth a damn and worth spending any significant time.
I have spent time on others. But they had too many members that were supposed adults posting with child-like mentalities with the easily bruised egos to match. And if you didn't see things their way, you were berated and chastised, especially if you were a Newbie.