FE4. The only game that I've played in my life that has ever made me come close to crying. THAT was totally and completely unexpected. Best plot-twist ever. 2nd gen... haven't finished yet. Kinda confusing, because I never payed attention on the family ties on the 1st gen. Plot-wise is...
but then again, I've yet to finish the epilogue, so... definetly deserves a re-play.
Close second FE9. Very good story, moving plot-twists. Volke... who would have thought.