In general, I prefer to use the plot functions that comes in the basic packages in R to plot and display data. However, ggplot and lattice can be very handy for some tasks. I was visiting randomly some webpages on the internet this days and I came accross this blog. It compares lattice and ggplot. Very nice and useful if you need a general overview of both because you can compare them at the same time you check some of their functionalities.