It was already on my list, but I think I'll make it a priority now - it's very relevant to the Revolution.

Since you enjoyed Morrowind so much, I think you should play more MMORPG's, since it's practically a single player MMORPG. Also, try Jade Empire if you haven't yet - while completely linear unlike Morrowind, is very addictive and has a lot of great side quests.