I would suggest that most people here are rational enough in terms of epistemic rationality, but their instrumental rationality is lagging behind, if I may call it this way. Hence the need for self-improvement stuff.
Once you reach a certain level of epistemic rationality, you realize that what you want next is not more refined epistemic rationality (that would be sub-optimal), you'd rather have.. more winning.
Here's our place to discuss Less Wrong topics that have not appeared in recent posts. Have fun building smaller brains inside of your brains (or not, as you please).