Why would you choose metal roofing? Many might be concerned with the noise that it would generate, but when the roof is installed properly, with solid sheathing, even rain and hail won’t disturb you any more than with a different roofing material. Metal roofing is also safe against damage from insects such as termites and other wood boring insects. It isn’t at risk to catch fire from embers landing on it, and woodpeckers won’t be pecking at it.
The 2 main problems that you could be at risk for are dents and rust. To protect yourself from denting, you should avoid having trees with branches extending over your roof. For protection against rust, you should make sure that you don’t let water pool up on your roof. If you see the start of rust, maybe from the fasteners used, you should remove it, clean up any traces of rust and then cover with a coating to prevent the rust from reappearing.