Couldn't you just take all these negative stuff you came up with in connection to rationality, mark them as things to avoid, and then define rationality as efficiently pursuing whatever you actually find desirable?
That would be ignoring the arguments, as opposed to addressing them. How you define "rationality" shouldn't matter for what particular substantive arguments incite you to do.
So after reading SarahC's latest post I noticed that she's gotten a lot out of rationality.
More importantly, she got different things out of it than I have.
Off the top of my head, I've learned...
Where she got...
I've only recently making a habit out of trying new things, and that's been going really well for me. Is there other low hanging fruit that I'm missing?
What cool/important/useful things has rationality gotten you?