Another 4-5 (probably a 4.75) but I rarely have toasted bread. I love English muffins (similar to your crumpet) and a bagel. I like both of that range so it often means a double toasting to get them dark enough. And I don't use the bagel setting because I like both sides of the bagel toasted.
We haven't owned a stand alone toaster in years. We switched to a toaster oven around the time Munchkin was born, and haven't owned one since. Come to think of it, I don't know if he knows how to use a toaster? Now, ours is a combo air fryer/toaster oven and works really well. My preferred is between 3-4. 5 is too rough on my mouth. I don't like it when the toast scraps the roof of my mouth.
Strong 4.... but I like English Muffins or Crumpets. I don't eat it often, I get a really scratched roof of my mouth when I do eat toasted hard things (cereal, toast, certain chips)....