Assuming you know how to bake a bread...
I think flour is key.
There are many different wheat flours and some other cereals that can be used for bread. Try a few of them, in different proportions and see if you like the taste.
I like 25% rye, 25% strength flour, 50% all purpose wheat flour. So far, it's the best flavour for the buck. Spelt is also very good, but it is expensive.
Add 16 grams of salt per kilogram of mass, and a
spoon of olive oil or butter.
Sourdough/yeast is another question. Sourdough makes your bread more acid, depending on how much you add, but yeast is not always available. Also, sourdough bread is easier to digest. Yeast, on the other hand, is faster and easier.
You can increase the crust by leaving the bread more time in the
oven when the baking is over. The crust protects the bread from dehydration, so it lasts longer, but it makes it harder to slice it, more rustic to say so.
Careful. The more you bake the bread, the sour it gets.
Once you like the taste of your bread, you can use edible seeds for decoration (I'm using quinoa and poppy seeds), sprinkle flour cover, or fill with nuts and raisins, or dried fruits, or sausages, or whatever you see fit in the next mass.
So, try different things and see what your friends like more. (You have to try a chorizo baked inside the bread).