Heat the oven to 400°F (200°C).
Spread the chickpeas on a clean kitchen towel and rub gently to dry them. Discard any skins that come loose. Let them air-dry for 10 minutes if you have time.
Toss with the olive oil and spread in a single layer on a rimmed sheet pan.
Roast for 25–35 minutes, shaking the pan every 10 minutes, until golden and crisp. Bite one to test; it should crunch all the way through.
Savory: toss the hot chickpeas with the salt, paprika, garlic powder and cumin. Sweet: toss them with the maple syrup, cinnamon and a pinch of salt, return to the oven for 3–4 minutes to set the glaze.
Turn off the oven, prop the door open slightly and leave the chickpeas inside for 15 minutes to finish crisping.