Fabula Nova Crystallis Final Fantasy. Both released and unreleased titles in the series. I go through on and off phases with it - and right now I'm hooked.
The released (NA/EU) titles are
Final Fantasy XIII,
XIII-2, and
Lightning Returns. I'm obsessed with the mythology and geography in these games, and how everything changes over the timespan the trilogy covers. Gran Pulse and Nova Chrysalia are amazing worlds and I'm in awe every single time (don't care much for Coccoon though). <3 I restarted
FF13 a couple of days ago, and I'm planning to play the entire trilogy over again (third time!!).
When I don't have the PS3 on I'm still thinking or reading about it. Currently listening to the soundtrack to the first game, too. It's all I've listened to since I restarted
FF13. >.>
As for unreleased games, I don't think I've been so antsy over a game coming out as I am over
Final Fantasy XV in many years - but it could easily be over a year still yet.

Restraining myself from looking for new info too often. Don't want to get too hyped
ha failed already.