I'm going to vote weight, even though it is a light notebook for a 17" screen it is still heavier than most notebooks. Which doesnt matter much to me anyway because the 9300 will own lighter notebooks in terms of performance!!!
I voted "other"... I think the worst feature is the AC97 audio.
Someone at Dell should be fired for not implementing the new Intel Azalia 7.1 audio, and if it turns out that it dosn't support ExpressCards either, someone should be fired for that too.
Worst feature? The division between the 9300 and the XPS2. Why do I have to buy flashy LEDs and be restricted to 1920x1200 to get the fastest processor and video card? Either allow the 9300 to have similar options, or let the XPS2 have the 1680x1050 screen.