This depends very much on your use. If you charge over night there’s no need to charge super quickly. My overnight charger is still a dingy old 5W from Apple. But if you need something to charge at the gate 20 min before you board, well then you’ll want to have a charger with more oomph.
As I linked to above, as of iOS 13 Apple claims to have introduced smart charging software. So if that stuff lives up to the hype, it should learn not to charge your battery faster than necessary, even if you’re on a higher powered charger.