Footwear is important, but not everyone has the same foot so it's up to you to ensure you're in the correct shoe. For general backpacking, thru hiking, and on trail hiking, consider using a trail runner that is NOT waterproof.
The more breathable your shoe is, the less risk your foot has of forming blisters due to trapping moisture.
For backpacks weighing less than 50 lbs, you really don't need the ankle support of a boot unless you have an issue with rolling. Trail shoes are light, comfortable, require minimal break-in, and promote building up strong feet.