Well, I don't think any of that is easy at all, and none of it is something a beginning drummer will be able to do right away unless they were blessed with an innate gift.So the question is, what’s the hardest thing to master on drums?
1. Buzz roll
2. Fast linear drumming
3. Deep pocket/groove/feel
4. Something else?
But, I think one of the hardest things to master on the drums is developing consistency in being able to control the sticks and pedals so that you are in full control of whatever you play each and every time.
In essence, I find the difference between being "good" and "great" lies in another saying, that "amateurs practice until they get it right, professionals practice until they can't get it wrong."
I'm still dumbfounded in how I can be pleased with my playing one day and the next day feel like I'm picking up the sticks for the first time.