Not sure if these count as "blind sports" or other sorts of flaws, but off the top of my head, a couple would be akrasia and also, well, remembering to use what rationality I have when I actually need it.

(ie, remembering that politics is the mind killer BEFORE getting into an argument, as a simple example.)

Um, let's see, what else. Hard to say, since, well, the true blind spots would be the ones I wouldn't know about, right?

There're many ways which I fail to apply what I know in theory, but a lot of that would be covered by "akrasia and failing to remember it when I need it."