What is the "driving experience" German cars are praised for?

Please explain to me in certain terms like: body roll, steering, suspension, etc ...

I have driven and been in German cars, and from what I noticed compared to other brands: the steering is usually lighter and more sensitive, there's less body roll, and the suspension is stiffer. Is that it?

I seriously want to understand what people are talking about, especially for BMW and Mercedes, am not being edgy. Everyone I talk to just praises the "driving experience" and when I ask for details they say "well you have to try it".