Does no one else flour them?
I use basically the above methods posted, but before I put them in the oven I sieve flour over them. I used to use onion powder that also works.
Also when I put them in pre-heated roasting tray with fat already hot, I take a spoon and tip the tray a little so the fat pools in one corner, and then spoon it over the potatoes (should cook a fried egg like this also).
The other thing I find is contrary to what you read, but I don't put the oven too high, if you got time 150-160 is fine, saves getting those corners too dark, more even roast.