Mark, most responsible and educated keepers feed frozen/thawed.
Live mice can injure a snake.
Live mice can transfer parasites to the snake.
If your snake is happy with frozen/thawed, it is better for your snake to keep feeding frozen/thawed.
In nature, very few hatchlings live til their first birthday, most are eaten by predators, or die of starvation. Many get hit by cars.
We do what's BEST for our pets, and in many cases, that means throwing "natural" out the window. It isn't natural to be in captivity in the first place!
If you truly enjoy watching one animal kill another, there is something wrong with you. Mice can feel pain and fear like any other animal, and if you get off on that, you have a real problem.