I am an former Estate Agent and would say the following;
It is very clean, painted the almost compulsory grey with no clutter however when I initially looked at the pictures it presents as a cold, clinical house. The only splash or deviation being the flowers in the lounge. You need to inject some warmth and loose some of the grey which had become the magnolia of years previously.
Kitchen is again cold, a single pot plant, cookery book or le Crusset /Chasseur type cooking item would suggest more happens than a cup of coffee in that kitchen.
You have a lovely back garden but it needs a table and chairs, the token attempts with pots scream these will be taken when you move and then all that is left is an expanse of grass and nothing else. How about planting some borders? Current set up gives the impression you were never, literally going to put down roots. People generally want to buy houses with a good vibe and yours to me screams could move at a moments notice as there is no real connection to the property. Also a barbecue showing it is a sociable garden for the months ahead.
The shed at the side of the house, paint it a nice appealing but subtle colour, but certainly not grey!
There is a distinct lack of any personal detail, houses record life events and it is reassuring if there is a couple, but only a couple of pictures of weddings, graduation, significant events etc and such like dotted about.
The pine bed frame in the main bedroom, could that be altered? Doesn’t fit in with the look.
Books on the bedside table would counter balance the ‘dine and dash’ feel of the house.
I can’t remember if there are fluffy towels in the bathroom, if not they are needed.
Will have another look at the photographs and come back.