Morrowind all day! Easily my favorite RPG that isn't japanese. I could've praised it with paragraph after paragraph if I wanted to, i've had the elder scrolls argument MANY times.
Suikoden 2 is the last game I went back and played through again. It was still as amazing as the first time I played it! I like how theres no cliche ancient evil, damsel in distress, chosen one, someone trying to take over the world, etc. At the end of the day, it's just a tale between 2 good friends.