i don't see myself as a part of that "community" but many of his writings are informative. I put together the original print-friendly version of The Sequences before he wrote his book on rationality:

https://www.lesswrong.com/posts/j6byboWcPASu5cYk7?commentId=D8GQQYWYeMTuN8mLC

I think its at least good to know the many ways our brains fail to work properly. also he's a good writer. #HPMOR is a very entertaining book.