Most generic paprika in grocery stores is mild and considered "sweet" paprika. If you'd like more flavorful sweet paprika, seek out a brand from Hungary or Spain.
Using a bowl to toss the sweet potatoes in oil makes it easier to coat both sides of every slice. If you lay the slices on a sheet-pan and drizzle oil over the top the slices won’t be evenly coated.
Sprinkling the spice mix over the sweet potatoes and tossing them in a bowl is easier for the same reason; each slice is more likely to get an even coating of spices.
You can make half the amount of sweet potatoes if you are feeding fewer people. You can store extra spice mixture in your spice drawer and use it to season roasted vegetables, roasted winter squash, pork, chicken and shrimp.
Deciding whether or not to peel the potatoes is personal preference. The skin adds a chewy texture and earthy flavor.
If you prefer, you can leave out the cinnamon (and use only savory spices) or leave out the black pepper (which makes the sweet potatoes just a little bit spicy.)
Instead of olive oil, you can substitute vegetable oil, coconut oil or avocado oil.