I like what I see so far. Unfortunately, the bits and pieces are in a vaccuum, so my concept of the rules as a whole is going to be skewed. It is very much a Blind Men and the Elephant sort of vibe. Some of the changes are like my house rules, so my current experiences with 3.X are influencing my reception of the leaks. Likewise, some of the fluff changes are like my current fiction project. At least, the fey plane and the plane of the dead, not so much the names. Ah vanity.
I could happily play 3.X until I am so senile I play LARP style in Steam Tunnels with an imaginary Tom Hanks. But, I like following the slowly developing picture of a new edition, just like I did 8 years ago on Eric Noah's site or 18 years ago in the pages of Dragon for 2E. I like the 'new and shiny' and the vicarious sense of the delopment of the game.