Space for a dishwasher
Bath not just a shower
Scratch those; both can be changed.
The important dealbreakers are issues which no owner of that property can ever change or control.
Location, aspect, views and outlook, parking have to be right.
Distance to source of smells (kitchens, brewery, chemicals, fumes, smoke ), noise (pub, bar, school, emergency services base, livestock, busy junction, bottle bank, commercial premises which operate 24/7, busy bus stop/ road junction/ traffic lights.
Proximity of waterways, (flood risk) neighbours large trees, higher buildings (shade, lack of privacy, threat to foundations).
Hill ? ( think ice, gritting /snow clearance in winter heavy trucks changing gear,)
Valley? (think storm drainage/flood)
Local Plan. What's in the pipeline that would affect the property?