I think that the number 1 thing that buyers are looking for is value. They want to know if the property that they are purchasing today will be worth more in 12 months, 18 months, and more. There is no way to know what is going to happen in this market (it appears to be back on the road of appreciation) but if it takes a turn how greatly will value be affected.
I think the second most important thing to buyers is information. There is a tremendous amount of speculation on what the market is doing and what direction we are going and how the current president or economic factors or the unemployment rate is affecting things. Buyers want reliable information so that they can make an educated decision. They don't expect a crystal ball but they do want to know what the sales history in this neighborhood is, and what the school district it is (and how that school district is rated), and what the demographic is, etc etc. The information is out there but they need to be able to go through it in an organized way and make an educated decision.
Lastly would be all the specifics to the house: bedroom and bathroom requirements, floor plan (open versus divided), lot size, neighborhood etc.