Ars Magica gets a lot of theoretical discussion on R/RPG at least once a month, if not once a week, and Mage... Naturally, being a White Wolf Game, it gets almost as much appreciation, but nowhere near as much theoretical discussion.
"The most deadly poison of our times is indifference. And this happens, although the praise of God should know no limits. Let us strive, therefore, to praise Him to the greatest extent of our powers." - St. Maximilian Kolbe