With a few minor exceptions, its Epcot. Sure, the attractions in FW aren't what they used to be, and there's some temporary theming problems, but compared to DAK its great.
Here's a few quick reasons why I don't like DAK:
There's only a couple of pathways to get around the park, and no quick transportation options available anywhere. There's no train circling the park (only the Rafiki's Planet Watch which is cut off from the rest of the park), no boat ride, etc.. The Tree of Life "Hub" doesn't really make things easier to get to the way MK does.
The pathways are too narrow and bumpy in many places, and with the average stroller brigade, it makes it difficult to get around.
Then the parade (which I realize is leaving now) causes massive backups....I worked as a contractor for a few months and when I had to get from the Safari area over to Dinoland...if the parade was going on, it was nigh impossible to move.
There's very few air conditioned places, only a few shops and eateries. In the summer, with the brutal heat and trees everywhere, the humidity seems to be much worse.
It is easy to get lost in the park....since the entire park is just trees, trees, trees everywhere.
The theming, while it is accurate, is far from the idealistic versions you see in the other parks. They're very run down, dilapidated and poor looking. While they are definitely accurate to the source "material" in this sense, it never gives me the positive vibes of the other Disney parks. This is more of a personal preference thing with me, and I realize that a lot of people disagree on that point. I even had a discussion with Eddie Sotto on here once about it.
To me, the park is built on too much authenticity and not enough on accessibilty for the average theme park guest.