I say that the Elder Scrolls series of games are the best of the RPG games out there. Especially on the PC, where fan-made modifications are available. These mods (as they are usually called) expands upon the game in some very interesting ways. Some are not as easy as others to install, but once you learn how to find and install them, you will be able to expand the game to unlimited proportions. Fallout games I have recently started playing, and I believe these games will come up to par with the Elder Scrolls.