for me Navigation is most important, coz if you jumble up its irritating to find contents.
secondly, images should not be large (like 1mb-2mb) shrink the images size to some KB. why i said that? many people in the world still are using 256kpbs modem so large images loads slow and will irks the users.
thirdly, color combination. It is very important since good colour combination will be pleasing to the eyes.
fourth, the looks of the website should be modern and not like the shirley's recipe site link here