I'm usually a fast but pretty mellow driver.   What drives me nuts on Alaska roads is the rubber-necker or 80 year-old in a 40 foot motorhome who drives 35-40 mph in the 2-lane zones but when the road widens out with the passing lanes speeds up to 70; I've had that happen a bazillion times on the Seward and Sterling.   I don't know what you do about that, we haven't perfected IQ transplants and it isn't polite to shoot them, but beyond the crazy punks in pickups issue, that's the one I think causes the most problems; these people hold up traffic for miles and then when the road widens, they go like a bat out of Hell, so you either can't legally pass them or you just say "Hell with it" and go  80 to get around them and hope you don't meet the AST.