No ballast at all yet on my layout, I want to very much but am still a ways from putting it down and have not decided on who has the 'best' ballast to use.
Y'all got me leaning towards a 'real rock' type of ballast. To my mind using 'real' rock where THEY use 'real' rock will help the overall 'look' blend together better. I'll be trying to use 'actual' material as much as possible, 'real' dirt where there is dirt and 'real' stone where there should be stone. Some will have to be 'fudged' but that is unavoidable.