Hipped roof - ideal slope?

Tip 22 and 30.

Then it might be worth aiming to find an option in the middle; what do you think? I can have it visualized.

can you estimate approximately how many degrees the two roofs I posted have?

No, I can't... visualizing will help you a lot. If you feel it looks right now, then you have your angle

Do you actually have to pay attention to something specific with the roof tiles so that the general contractor does not take advantage of you and deliver low quality?

can you estimate how many degrees the two roofs I posted are approximately? Then I can grasp it better.

Tip 22 and 30.

I already said that, in #8:

For the left house it is probably 30° and for the right house 22°.

and in your "main thread":

Also consider again the optical effect of the reduction in drawing scale here. In reality, your eye level is four meters below the eaves. Under 25° roof pitch you will not see the ridge from the street.

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Then maybe it would be desirable to find an option in the middle; what do you think? I could have it visualized.

You already have your visualization, in your picture here on page 1: one for 30 and one for 22 degrees. Do you really still have to visualize – don’t forget: the trap of drawing scale! – what 28° are?

I would now try 25°. 28° would of course also be an option.