Always. My/our priorities are: distance from station, aspect, light, quality of road/houses either side, room size and ceiling height. Everything else can be changed - water pressure is a pain in the butt to improve so turn on the shower (investigate if they are electric)and taps . However, I have always bought in a stagnant market and underbid up to 10% or more. The exception was a house I loved but I only broke even when I sold it. A FULL STRUCTURAL SURVEY is essential.
Conversely, when I sell, my houses are pitch perfect structurally, and interior wise. The last two, I haven't lived in when they were sold so they were tidy. Always sold within a day or two and either very close to or above asking price.
Except for the non negotiable my key lookouts when buying are: window frames for fit, opening and rot, skirtings for signs of rot, water pressure, age of boiler, saggy ceilings and painting over (if a ceiling is brilliant white and the skirtings/door isn't, there's probably been or is a leak (check what's above) etc. If there are limited cupboards and shelves in a small house and no clutter, where is the clutter? Cupboards/storage makes small rooms look smaller. If the house is immaculate - stuff has almost certainly been removed and you won't be able to replicate the look.
Tips for selling:
Light - replace the energy saving bulbs with the highest watt your fuse box can take.
Windows: minimise curtains to maximise light where possible and have windows professionally cleaned inside and out (it makes a huge difference.
Furniture: think about its layout and forget about the TV. Two sofas may look better facing each other than at right angles so everyone can see the TV. Remove things like coffee tables from the middle of small or average sized rooms. If rooms are small - switch in smaller furniture or think about it in advance and don't swamp them. For example, if a bedroom is 9x6 or less, put in a 2ft6" single rather than a 3ft one. It makes a world of difference to the potential buyer's perception.
Smell: dog and cat smells do not sell houses; neither do other strong odours. Carpets may need to be deep cleaned and windows opened for 24/48 hours.
Bathrooms: spotless with no brown toilet bowls.
Front of house/front garden
Tuck bins away, paint and clean front door/outside paintwork, have any trees/foliage trimmed or cut back for neatness and light. A window box or pot can help with a bit of colour. If there's a drive, have it jetwashed.
I note dear reader the full priced house DH and I viewed. It was rancid, it had had leaks, it is the only house, where I'd have refused to take off my shoes if asked. Children were living in it and dogs, very noisy dogs. The photos looked great. It was on the market for £1.3m. All the non negotiables were right and it could have been a great project - for about £950,000, but love was absent in the house's every seam and feel. It isn't just about objectivity.