I haven't played in an Eberron game yet, but I like what I've read. I'm adding the Warforged to the next campaign set in my homebrew, which should start up this August.
What this poll has me wondering is, "How many people actually played D&D in a traditional setting?" Let's leave aside the fact traditional settings are often described as an amalgam of Tolkien, Leiber and Howard, three writers who don't have much in common other than heroes with swords.
I've been playing D&D since 1985. Every campagin I played in was some kind of genre kitbash. Thus my idea of traditional D&D is the kitchen-sink approach, in which ninja kill Knights of the Round Table for the Ring of the Nilbelungen, characters occassionally fireball combat robots, attack dragons with magical fighter-jet analouges, or invent/corner the stock market (just for kicks).
My experience of D&D is that its always been an ungainly hybrid of different genre influences, so Eberron strikes me as a case of 'more of the same' --albeit very well done.