Personally, I love what i've seen so far.
Im the kind of player who gives a 'Waaagh' when charging, and trades in-character banter in challenges - this sense of fun appeals to me, rather than the more serious nature of WHFB. I am currently more excited than ever at the idea of battling in the Old World!
I get that a lot (lot lot lot) of people won't like AoS, but its like the RP world; no-ones gonna force you to play this 'edition' - chances are, if you don't like it then your regular gaming buddies aren't the kind to either, and you can just go on playing what you like.
Only the Fearful fear Fear.