I have read some of the sequences and such but - I guess I'm a rationalist at heart already, maybe because I've studied lots of logic and such, but a lot of it of the basic stuff seemed pretty apparent to me. I was already up to speed on Bayes and quantum mechanics, for example, and never considered anything other an atheism. And I already optimize and try to look at life in terms of expected payoffs and other very rational things like that. But, it's possible I've missed a lot of the material here - I find navigating the site to be pretty unintuitive.

Be very careful thinking you are done. I was in pretty much exactly the same position as you about a year ago. ("yep, I'm pretty rational. Lol @ god; I wonder what it's like to have delusional beliefs"). After a year and a half here, having read pretty much everything in the sequences and most of the other archives, running a meetup, etc, I now know that I suck at rationality. You will find that you are nowhere near the limits, or even the middle, of possible human rationality.

Further, I now know what it's like to have delusional beliefs that are so ingrained you don't even recognize them as beliefs, because I had some big ones. I probably have more. There not easy to spot from the inside.

On the subject of atheism... I used to be an atheist, too. The rabbit hole you've fallen into here is deep.

The Seattle guys are pretty cool, from those I've met. Go hang out with them.