I like mine cut into lengthwise quarters or 6ths or 8ths, depending on the size of the potato. I never bothered with teh type, because they don;t sell them here by type, or only began to recently.
I heat the oven to maximum (just as high as it will go)
take a flat baking sheet, with shallow sides (no more than an inch or it will hold the steam and they'll steam and not brown) , put a sheet of parchment paper so tehy won;t stick, drizzle a little (very little) olive oil on it.
toss them with a little olive oil, salt and nice grated black pepper.
Put on the paper on the baking sheet, not too packed together, in one layer, and set the pan directly on the floor of the oven
If you are roasting meat, set them around the roast, can be chicken, beef, pork or lamb - they all impart their own delicious flavor
roast till they brown on one side, turn over, roast till crispy and nicely browned on the other.
In my opinion, if you boil them first they'll never get brown enough, at least for my taste. Tastier by far than french fries.
You can also put sausages around them, and even a couple of red bell peppers, cut in pieces, and/or a couple of quartered onions, just be sure you have everything in one single layer. very tasty.