One thing we Zaurus owners seem to be obsessed with is size. Is it too small, too big or just right!
For me, its pretty close to perfect.
I could live with a little (i.e. 10% or less) wider or deeper, but not much thicker.
Ideally, I'd prefer a screen that filled out the entire upper lid (smaller edge bezel)
and a keyboard with larger, sculpted keys (like the new Fujitsu).
Much more weight would definitely suck, and more moving parts
(HDDs, etc) I can live without.