To me rough and catchy are different things. I don't really have a use for a rough dog, but good pack of catchy dogs can be very effective. The only problem is that that grit comes with a price and you better carry a gun just in case.
Another thought that comes to mind is there's a big difference between a true catchy cur and a dog that will catch hogs it regards as small enough to catch. I prefer the later. I have absolutely no problem with a cur not giving a hog more repect than it deserves. I've got a dog like this in my yard and he has proven his worth many times over. There's a fine line here but a line does exist.
X3 You and I think alike