Given the background description of some cooking related query, summarize the question into a title

https://somedayilllearn.com/how-to-make-black-coffee/ Go big or go home. I typically use 2 tablespoons per cup. Weak coffee is more likely to be bitter.Is there some truth here? Why would weak coffee be more bitter?
Is weak coffee more likely to be bitter?

In other words does it make a difference in the event that a recipe calls for a Red wine you use a Merlot, Cabernet, Shiraz ect..?
When a recipe calls for Wine, does it make a difference what wine to use?

Which potatoes in the US are best for twice baked potatoes? My twice baked potatoes didn't turn out right. The skins broke, and punctured to easily. I was using Yukon golds of medium size lightly washed, and punctured with a fork.

Which potatoes are best for twice baked potatoes