It is not necessarily quantity - it is quality in my case. When I was very young and DMing I was extra gory in my descriptions because I was a young nitwit. As I grew older, the violence remained - but only where useful. I now use the violence to differentiate creatures, situations, etc... to give them a specific feel.A lot of people going R must find a way to get like 2-3 hours of excessive violence into a single gaming session.
I still haven't figured out how to feature that much combat