They're all sad to me.
Even one of the recent ones (which wasn't an anim per se) that I watched (Oz the Great and Powerful) was filled with too many sunsets, while that might seem atmospheric and romantic in such quantities at this time of the year makes it gave a sense of fiery doom in the background in my mind. You know that "happily ever after... but wait? what's to do now you have everything you wished for?" effect. Mind due it's probably just my depression talking here.
I love TLK and FatH, though for its nostalgic qualities, but I end up a warbling ball of tears by the end each time.