It's even more complicated than you think! The theoretical distributions you list are just that: theoretical. No real-world process generates values exactly acc

It's even more complicated than you think! The theoretical distributions you list are just that: theoretical. No real-world process generates values exactly according to a theoretical distribution. So you're not even dealing with a somewhat countable list of distributions -- everything has its own unique distribution! Fortunately, you don't need to model things exactly. A very rough approximation often gives me miles better results than plain gut feeling.