I do primarily country and Texas-Americana type stuff. I record live drums most of the time but I do occasionally use samples for replacement and blending-augmentation. And I also from time to time use total midi drums from the ground up for a project.
I have the Slate samples, and yes I would agree they are good but they are usually too processed for me and what I do. I prefer stuff that is a little more raw and organic to begin with, so I can mangle them myself
I have the Toontrack Avatar, Allaire, and the Nashville EZX. Out of those three I usually go with the Avatar, but I will a lot of times pull in X-drums from the other libraries. But I generally find the Avatar set to be the closest to what I am looking for.
Several years ago I bought some great kit samples from Andy Reilly, and I go to them sometimes for rootsy stuff. Andy has some newer offerings but I'm not sure what remains from the old sets, and what is brand new......