Once the Dalamud plotline started, 1.0 improved by leaps and bounds. It was fun seeing the changes after each patch - the moon growing bigger and redder, the Imperial patrols spreading across the land, the sort of FATE precursors involving Urianger/the Lambs of Dalamud/etc. It was neat to be around during such a dynamic time.

That having been said, 2.0 is a far nicer game by several orders of magnitude, and there's still tons of room for things to change and grow. There are very few things I miss from 1.0, and the biggest one is easy to fix since I have a soundtrack CD. ;)